Prompt: His Detective Prince (Persona)

Summary: Yu isn't jealous. He's certainly not jealous of others looking at his Detective Prince, pining for her, wanting her. No, not jealous at all. He just wants to make sure everyone knows she is his. And that he isn't scared of her leaving him. No, sir. Includes: No smut, but dirty fantasies, comedy, slice of life.

---

Yu’s life completely changed when he moved to Inaba. Not just because he was roped into solving a murder mystery, not just because he managed to make friends so tight that they might as well have been family, but because of the beautiful detective he met while he lived there.

He had never really been one for love at first sight, but Naoto… Naoto was someone special the moment he saw her. Of course, when he first saw her, he thought she was a boy. A strangely pretty boy…

Naoto’s cold, stoic expression hid a warm interior, a desire for justice, and a determined spirit. Yu quickly became infatuated with the detective, gaining a sense of respect for Naoto. Even as she investigated him and his friends, that respect grew until it quickly became something more the more he spoke to her. 

There was a time when his heart would race just thinking about the blue-haired detective. The normally calm and collected young man would lose his cool whenever the detective’s eyes met his. Naoto made his heart race even worse than Rise, a famous idol and the crush of thousands of boys all over the world. 

And while Rise was an amazing woman and friend… Naoto was so much more.  

Yu wasn’t ashamed to admit that there was a time, however brief, that Naoto made him wonder if he was straight. 

He had never thought much of his own sexuality. He had liked girls for as long as he could remember, but he was comfortable enough with his feminine side that he walked onto a stage wearing a dress. He had no problem being a good cook or playing the stereotypical mother. His time at the daycare was one of his favorite jobs.

Still… Naoto left him wondering for a while if he was at least bicurious. Eventually, Yu shrugged it off, deciding that it didn’t matter. He accepted the fact that he had feelings for Naoto, regardless of their gender. It didn’t matter what his sexuality was, whatever he felt, he loved Naoto. 

He didn’t feel relief when he found out he was actually a she. All he felt was concern. Naoto was so against her feminine side, and it wasn’t even really her choice. Society told her that a woman couldn’t be a great detective, and so she rejected that part of her.

The young man had always had an innate desire to help others. Naoto was no different, no matter how beautiful he thought she was. 

Yu would end up becoming Naoto’s closest confidant, and funny enough, she became his. She was the first girl to really ask him about his past, to talk to him about who he was and where he was going with his life.

She challenged him, and he loved her for that. 

Then came the day he told her his feelings. He told her he loved her, and for over a week, she avoided him. 

That was one of the worst weeks of his life. Then when Nanako was hospitalized, she came back. She was there, and she was able to see past all his smiles and lies. She was there to comfort him, to care for him, and… and he fell deeper in love with her since. 

Eventually, the two talked about his feelings for her, and that was when she confessed her own. She loved him in return, and they shared their first kiss…

And even as the end of the murder case hung over their heads, Yu had no idea just what he was about to be hit with. He thought this was the ‘happily ever after’ for the two, but he had no idea how stressful, ridiculous, and embarrassing that ‘ever after’ could be…

---

Yu was more than comfortable standing on the roof of his uncle’s home and screaming to the world that he and Naoto were dating. He told her as much, and he laughed as her face turned a bright shade of red at the idea. 

Naoto was not so eager to share the intimate details of their relationship, and Yu respected that. He was happy to date her in secret for as long as she asked.

At least, that was what he told her. 

The next day, Yu and his friends had a meeting planned about what they would do with Adachi. The real murderer and the source of so much pain and grief had escaped into the other world, and they had every intention of pursuing him. 

The group would meet at Junes afterschool, but Naoto was assigned to clean a classroom by a teacher. Apparently they needed someone to fill in for a sick student. Yu, wanting to spend more time with his girlfriend, volunteered to help her so she could make it to the meeting quicker. 

Really, he’d take damn near any excuse to spend more time with her. Yu was on his way out of his class when someone stopped him, holding their hand in front of him to make him pause. He stared at this person, and recognized him as one of the members of the soccer team, Eichi. 

Yu hadn’t really spoken to the brunette much, but anytime they did, Yu did his best to be polite and cordial to the young man. He put on a smile as his foot tapped on the ground. He wanted to see his Naoto, but if Eichi needed help, he’d do his best.

“Something wrong, Eichi?”

“Uh, I just wanted to talk to you, Yu-san. It’s about a girl. I-I heard you were helping some other guys with their girl problems, so I was just wondering if you’d help me too.”

“Oh.” Yu did help some other guys last week, but still, did it have to be today?

“I was actually on my way to talk to this girl downstairs, a-and I’d hope you’d be my wingman?”

“Sure,” Yu replied with a good-natured smile. “I was on my way to help a friend of mine downstairs anyways.”

“Really? Awesome! That’s so cool of you.”

“It’s no problem. So, this person you like is a first year?” he asked as he walked out of the class with Eichi.

“Yeah. She’s amazing. She’s so smart, and is just… so beautiful.” Yu smiled at the young man’s grin. He knew what it was like to fall in love. 

“She sounds amazing,” he chuckled in return as the two walked down the stairs. Yu followed the young man into Naoto’s classroom, and he watched as Eichi looked over the classroom full of students. 

Some had already left, while others were talking with their friends about their plans. Naoto and a few other students were talking about how they’d clean up the classroom when Eichi’s smile grew even wider.

“Ever since I saw her in that beauty pageant, I just knew Naoto was the one.”

“Yeah, she’s pretty awe-Wait, what?” Yu blinked, eyes widening as he watched Eichi walk over to Naoto.

“H-hey, Shirogane-san!” Yu felt his skin crawl as he watched Eichi walk up to Naoto, a blush on his face. “Are you cleaning up? Can we help?”

“Oh. Thank you, um… Senpai.” Yu felt his blood boiling when Naoto called HIM Senpai. No. No, no, no. Yu was her Senpai. He wasn’t about to let Eichi steal Naoto away from him!

There was a little voice in his head that told him he was being ridiculous. That Naoto loved him, and him alone, and she wouldn’t just abandon him for someone else, but Yu didn’t listen. 

Despite his cool and confident nature, Yu was still a young man. He made mistakes, he got angry, and he wasn’t always sure of himself. He had never had a girlfriend before, and when one’s first girlfriend was as amazing as Naoto Shirogane, well… Yu wasn’t ashamed to admit that he would have done nearly anything to keep her.

The only thing that could stop Yu from fighting for his love was Naoto herself. Without her speaking up, Yu’s lips turned into a scowl as he stepped forward. 

“”Great, you know, maybe after this we can go out and get something to eat? Just you and-”

“I’d love to go out and eat with you, buddy,” Yu chuckled as he interrupted, stepping forward and speaking through gritted teeth. 

“Huh? N-no, I didn’t mean you. When I said you, I meant Naoto.”

“But you said Yu.”

“No, I-” The other boy shook his head before looking at Naoto. “I just wanted to know if y-Naoto wanted to go get something to eat with me. Maybe something at Junes or at Aiya’s? My treat.” 

Yu quickly opened his mouth. “That sounds great, Eichi, but fair warning, I eat a lot. Finished the Mega Beef Bowl over at Aiya’s.” Eichi and Naoto blinked, raising their brows at Yu as he continued, a proud grin on his face. “Have you finished the Mega Beef Bowl, Eichi?”

“Uh… N-no. I’ve never even tried it.”

“Oh. I see.” Yu made his disappointment clear as he shook his head. “I understand. You need a lot of skills and refined attributes to finish it. Understanding to see it as it is, a keen mind to pace yourself, courage to face such an insurmountable challenge, and determination to power on through, but I guess not everyone has what it takes.”

There was silence in the room as Yu began to realize just what he had said. He had just wanted to prove his own superiority to Eichi, but now he felt he might have overdone it. “Er, I mean, I’d love to come.”

Eichi’s brow furrowed and he opened his mouth to speak, only for Naoto to interrupt. “Actually, I have something I need to do once I’m done here. As do you, don’t you, Senpai?” she asked, staring at her silver-haired boyfriend as his eyes widened.

“Oh, ri-”

“Huh? I don’t have anything planned.” said Eichi, quite confused.

“She meant me,” Yu growled, his voice an uncharacteristic level of hostile. Both Eichi and Naoto seemed surprised by the gesture, but the silverette blushed and tried to shrug it off. “I-I’m just saying. She meant me…”

“Perhaps you both should go,” Naoto commented, raising her brow as both boys blushed. 

“No! L-let us help,” Eichi offered, and Yu huffed as Naoto handed the other boy a mop. He saw their fingers brushing against one another…

The group soon began to clean, and Yu did his duty, wiping down the floor and desks as he kept himself as a barrier between Naoto and the other young man. He wished he could have blurted out that he and Naoto were dating, or just deck Eichi across his stupid face. Either would have been good. 

Maybe both.

“Phew, this bucket is heavy.” Yu raised his brow as he saw Eichi lift the bucket up and down again. He had rolled up his sleeves, showing off his arms as Yu realized his cunning plan.

Naoto was looking at him. Looking at those… those above average arms Eichi had! They weren’t that good! Kanji had bigger muscles. But what if Naoto was into muscular types? Yu bit his lower lip as he walked over to the other student, grabbing the bucket by the handle. 

Yu told himself that Naoto would never be so shallow to date someone purely for their muscles. But if she was, he knew he had Eichi and even Kanji beat! After all, it wasn’t the size of the muscle in the competition, but the size of the jealousy in the protective boyfriend!

The silverette groaned as he picked up the bucket water with his already tired arms. He grinned, lifting it up and down, grunting quietly as he looked at Naoto. “Psh. This is nothing. Easy as pie.”

“Are you sure, Narukami-senpai? Your arm is shaking.”

“Psh! This is nothing. I usually work with f-forty pound… ton weights.” 

“Oh, please!” Eichi growled, before he took the handle in his grip. “Let go! I can lift it more! And better! Higher!”

“H-hey, quit tugging!” Yu and Eichi fought over the large bucket for a moment, and Naoto sighed as she walked over to the two. She opened her mouth to say something, when their fighting splashed almost all of the water onto Naoto’s body.

The woman cried out as the dirty, cold water hit her, but that was hardly the worst thing that had just happened to her. Yu and Eichi quickly realized how badly they had screwed up when they realized Naoto hadn’t been wearing her black school jacket.

She must have been hot from all of the hard work. She needed to breathe a bit, but with her white top, well… It soon became see through. And the sarashi she wore? Yu could have been wrong, and he definitely wasn’t staring, but… but was her sarashi tearing?

The water must have made it easier to break, and with Naoto’s legendarily large breasts hiding behind those bindings then-

Yu quickly emptied the bucket and placed it on Eichi’s head, blinding him. “S-sorry, wardrobe emergency!” He reached for Naoto’s hand, but that didn’t stop his eyes from staring at her breasts. The bindings were indeed ripping! Torn apart, freeing her bo-

He quickly averted his eyes, but Naoto was already following them to where they had been. Her eyes widened as she stared at her breasts pushing against the transparent fabric of her clothes. She quickly covered her chest, letting out a cry as Yu grabbed her arm and pulled her along. 

“D-don’t look!” Yu saw Eichi lift the bucket up, staring at Naoto, trying to catch a glimpse of something he really shouldn’t...

“I-I’m not!” he replied, leading her out of the classroom and to the nearest bathroom. 

It was there that Naoto hid, her face a bright, bright red blush. Yu stood outside the bathroom, with his jacket in his arms as he waited for Naoto to return. It took a few minutes, and during those few minutes, Yu struggled to keep his mind off what he saw. 

He tried hard not to be a pervert. He joked, but he wasn’t. He just wasn’t. 

But holy crap, Naoto’s tits were huge… His face was burning up just thinking about-

“Senpai.”

“Breasts?! Yes! Yes, what is it?!” he practically squeaked, looking at Naoto as she raised her brow. She snatached his jacket out of his arms and draped it over her small body, glaring at him as he nervously chuckled. His cheeks were a dark shade of crimson, while hers were still a subtle shade of red.

“Please notify the others we will be late. I would like to pick up fresh clothes at my apartment.”

“R-right....”

---

The next day at soccer practice, Yu and Eichi avoided one another. Yu could tell the other man was annoyed and frustrated with Yu, but it was hard to sympathize when Eichi had flirted with his girlfriend.

The silverette sighed, knowing he was acting unreasonable. Yet when he remembered how Eichi had tried sneaking a peek at Naoto’s chest, his blood pressure shot up and his hands balled into fists.

What the coach said that day gave Yu a bright smile as he looked over the enemy team. 

“Alright, today we’ll be doing practice. Eichi, you’ll be the goalie for the red team!”

“Y-yes, sir!” 

Now, of course Yu wasn’t petty enough to punish Eichi for something he didn’t even know. Eichi didn’t know he and Naoto were dating, so he couldn’t exactly blame him for wanting to ask her out.  

Of course, that didn’t mean Yu couldn’t punish Eichi for peeking at Naoto’s bosom when her clothes were wet. He saw the man stealing a peek at Naoto’s breasts! Trying to guess how big they were, imagining what they felt like, how they…

Well, Yu knew everything that had gone through Eichi’s mind. Because the same thoughts had gone through Yu’s. Not that the silver-haired man would ever admit that…

The practice game began, and Yu moved like lightning to get the ball. He dashed forward, kicking it ahead of him as he saw Eichi shake. He could feel Yu’s murderous intent in the air as the normally calm player ran like a bat out of hell. 

Yu put almost all of his strength into his kick, firing the soccer ball at Eichi’s stomach. Of course, Yu hadn’t planned on him dodging said ball. Eichi jumped to the ground, covering his head as the black and white ball hit the rim of the goalie post, and in a one in a million chance, shot right back at Yu. 

The sphere blocked Yu’s entire gaze for a moment, before all he saw was darkness. 

When Yu opened his eyes, he was met with an entirely different kind of ball. Two, in fact. Naoto’s large breasts were pressed against his face, gently smacking him awake as she sat on him, pinning him down.

“Mmh…? Maotoe?” he muttered, his voice muffled by her soft tits. 

“Mmm, Senpai. I… I need help,” she begged, and her voice sent chills down Yu’s spine as his face burned hot with shame and… other emotions. “Please? They’ve gotten so big, I… I just need someone to put their hands on them, and I-I know you are that someone.”

She leaned down lower, nearly suffocating him in her tits, gently knocking them against his cheeks. Her lower half began to rub against him as he breathed in the heavy scent of her sweat. He shuddered as her voice beckoned him.

“Yu… Yu…! Yu!” 

A hand smacked Yu’s face, and he nearly jumped up, eyes wide as the pain exploded across his face. “Tits!” he shouted, face hot with pain and the residual effects of his dream as he looked around.

His teammates surrounded him, staring at him. Daisuke smiled, wiping sweat from his head. “Told you’d guys that’d wake him up!”

“D-Daisuke? What… What happened?” he asked, only to blink as he noticed his voice was… off. Like someone was pinching his nose closed. He touched his nose, only for his eyes to widen as he felt soft tissue paper. “What?”

“When that ball hit you, your nose was bleeding like crazy! We stuffed it full of tissue papers while the coach ran off to get the nurse.” explained Daisuke, a worried look on his face.

“Okay.” That part made sense, but… Yu touched his cheek, and stung at the pain. His whole face hurt, but the pain was centered on his bleeding nose… and his cheek. “Did… someone hit my cheek?”

“W-well, you weren’t waking up, and I got scared,” Daisuke explained, scratching the back of his head as Yu blinked. “So I tried waking you up. I started smacking you pretty lightly, but when you didn’t wake up...”

“My nose might be broken, and then you decide to smack me in the face?” he asked, tilting his head, only to frown as he heard his own voice. His blush grew hotter as his teammates snickered, trying and failing to hide their laughter. 

“Did you say ‘Tits?’” Eichi asked, making Yu smack his forehead in frustration… and cry out in pain as his already sore face felt even more pain. 

---

Time passed, and Adachi had been defeated. The evil was stopped, and Christmas was celebrated between him and his friends. Yu had one of the best Christmases of his life with Naoto, happily enjoying the holiday with her and her alone. 

He and his friends had a wonderful New Years as well, and then came Valentine’s Day. The young man waited by Naoto’s locker, waiting for her to come by and meet him so they could enjoy the holiday together. 

The silver-haired man was in the middle of texting Yosuke, teasing the brunette about his supposedly ‘friendly’ outing with Chie on this romantic holiday. Yosuke and Chie continued to argue it was just them hanging out and taking advantage of a special couple’s sale at Aiya’s, but Yu knew better.

He just wondered how much longer the two would go on “not dating” one another.

As he waited for Naoto, he noticed someone walking over and standing beside him. She had a box in her hands, clearly for the holiday. Chocolates, probably. Yu watched her, smiling as he spoke.

“Waiting for your Valentine?”

“Shut up,” the younger girl replied, glaring at him. He blinked, stepping back from her as she glared at him. “Naoto is going to love these chocolates, okay? So just… just shut your stupid, pig face.”

Yu frowned at how blatantly hostile the woman was, before his eyes widened. “Naoto?” Yu’s eyes widened. “You’re giving those chocolates to Naoto?”

“Yeah, and she’s gonna love them,” the fiery girl replied with a huff.

“You can’t give Naoto chocolates,” his lips uttered, and his eyes widened as he realized his jealous, possessive nature was rearing its ugly head again.  

“Why not?” She frowned, before gasping as she covered her mouth. “A-are you homophobic?!” she blurted out, and Yu quickly waved his hands in the air.

“N-no!” He looked around the halls of the school, terrified someone might hear something not at all true. “I’m not. I’m not!” 

She glared at him, crossing her arms as she held her box. It was clear she felt challenged, and now she was ready to try and defend herself. “You sure seem like you are. You, you… bigot!”

“I’m not a bigot!” Yu quickly replied. “I-I’m friends with Kanji!” He blinked and held up his arms again. “N-not that Kanji’s anything. I mean, he might, it’s not any of my business.”

The younger girl glared at Yu, who sighed. “I promise, I’m not a bigot. I just know that Naoto isn’t looking to date anyone right now. Boy or girl.” Yu then added under his breath. “Because she’s mine, mine, mine, mine...”

Yu chewed his lower lip as the younger girl glared at him. “What? How would you know? I’ve been stalking her for weeks! I know all about my Prince! I bet you don’t even know what book she’s reading right now.”

“Tommy and Tuppence’s Partners in Crime.”

Her eyes widened, before she glared a hole into his head. “What’s her favorite flavor of ice cream?”

“She orders vanilla, but it’s actually blueberry and mint chip with sprinkles and brownies on top. She only orders it when she’s alone. She’s worried people might think she’s childish if they knew.”

The woman growled at him, and Yu couldn’t help but feel pride at her anger. She thought she knew his Naoto? No, he knew her. He loved her. No one knew her better than him.

“She’s afraid of heights. True or false.”

“False. She loves tall places.”

“What’s her favorite season?”

“Winter.”

“What’s her favorite movie?”

“Neo Feathermen United: Heisei Generation Forever.”

“Ha! Now I know you’re lying!” Yu’s eyes widened when he realized what he had said. He was so shocked by his own mistake he barely paid attention to what the other girl was saying. “There is no way Naoto-kun would ever enjoy such a dumb TV show for kids!”

Before Yu could argue how Neo Feathermen was a fantastic piece of media, a voice caught their attention. “Senpai?” The two turned their heads to find Naoto staring at them, her brow raised up as both of her admirers blushed. 

“Naoto-kun! Here! I made these for you!” the young woman beamed, practically leaping towards Naoto to hand her the chocolates. “Happy Valentine’s Day!”

The Detective Prince glanced at the white box in her hands, before glancing at Yu. He gave her a not-so subtle shrug as he eagerly awaited Naoto rejecting the girl. Nothing personal, but Naoto belonged to him…

Unless she didn’t want to. Yu’s eyes widened at that, and he trembled in place for a moment as his imagination ran wild. Naoto, running off with another girl. Everyone would be so happy, yay, good for her…

Except Yu. Yu would be a broken-hearted, sobbing baby, stuffing his face in ice cream. 

Yu’s heart went from one to one thousand in a matter of milliseconds. He saw his girlfriend blushing at the other girl’s gesture. He watched Naoto raise up her hand, and he was practically sweating bullets as she reached for the gift... 

And push the box back into the other girls arms. Yu sighed with relief as the girl’s eyes widened, before she let out a loud cry. 

She quickly began to sob as she turned around and threw the box, slamming it right into Yu’s nose. 

“Ahh! Damn it! Again?!”

---

When Rise suggested the group go to the beach together over the summer, Yu had many mixed feelings. He was happy to hang out with his friends, but when the idea of Naoto in a bikini showed up… Well, he almost fainted at the thought. 

When Naoto replied that she wouldn’t be wearing one and made good on that statement, he was a mix of disappointed, relieved, and content. It was her choice after all, and she still looked cute in the shorts and large shirt. 

Of course, just because she wasn’t sexy, didn’t mean he couldn’t be. Yu had seen many suitors and admirers chasing after the heart of his Detective Prince, but today he would remind Naoto how good she had it. 

Yu walked up to Naoto as she read her book, walking right past a bickering Rise and Kanji. He walked right up to his blue-haired angel as she sat under a large umbrella.

“Hey there, Naoto. I saw a shaved ice stand over the-aarh!” he grunted, trying to show off his muscles as he pointed down the beach. 

Naoto didn’t look up from her book. The silver-haired man frowned as he tried again, posing and trying to direct her body to his toned abs. “Can you help me apply some sunscreen on, Naoto? You know. While the others aren’t looking?”

No response. 

One more time. “Can you point me to the gun sh-?”

“Senpai. Is there a reason you have been acting so strangely lately?” 

“Ah.” Yu’s face turned red as Naoto kept her eyes buried in her book. He chewed the inside of his cheek, before he sat down before her. “You noticed?”

“Indeed.”

Knowing the game was up, Yu confessed to Naoto his own insecurities. She didn’t move her eyes from her book, but he could tell she was listening, nodding her head and gesturing for him to go on. 

“I’m just… I’m just scared you’ll realize you could have someone else. Someone better. Someone your age, o-or someone better looking or… Or someone who will still be here in a few months.” Yu buried his face in his hands, sighing into them. “I’m sorry. I must have made you feel so stupid. I-I’m really, really sorry, but when it comes to you, I-I just feel so nervous. And scared. Like, I’d rather have another knife in my face, or-”

“Senpai.”

He stopped, glancing at her as she closed her book and closed her eyes. “I… I couldn’t imagine being with anyone else, but you. No one else helped me accept my feminine side. No one else helped me accept and love myself for who I am. Doesn’t that mean something?” she asked. 

“I-I know it should, but I can’t help but be scared. I know everyone else thinks I’m this perfect guy, but… but you’ve seen me weak. You’ve seen me scared. I’ve opened to you like no one else, and what if you didn’t like what you saw?” he asked, before he buried his face in his hands again. 

“I-I don’t want to guilt you into staying with me. I-I mean you can’t even look at me! I-”

“Senpai. The reason I can’t look at you is because I can’t…” Naoto stopped and Yu blinked. He looked at her, and he found her cheeks were a bright shade of red. “Is because I can’t look at you shirtless without… without blushing,” she mumbled. 

“O-oh.” Yu gulped. “So you don’t hate me? A-and you don’t want to leave me?”

“Perhaps this will answer your question.” She finally opened her eyes, and true to what she said, her cheeks burned a bright shade of red as she looked at his shirtless body. “Please, come with me.”

“Uh… O-okay.”

---

Naoto and Yu vanished to a separate part of the beach, hidden behind large stones and resting on soft, warm sand. The silverette watched as Naoto blushed before him, before she reached towards the hem of her shirt and lifted it up.

Yu’s eyes widened and he held up his hands. “N-Naoto, h-here?! R-really!? We shouldn’t! We-” Oh. Yu’s brain snapped in two as he saw the bikini top Naoto was wearing under her shirt. 

The white and blue striped top struggled to contain her large breasts as she looked away, cheeks burning hot as her heart raced. “I-I wanted you to be the first t-to see me in s-such risque clothing. I-I was too scared to wear the b-bottom half of it, b-but I hope you still-mmph?!” 

Yu kissed her lips, and Naoto’s eyes widened. For about a moment. She returned the kiss, wrapping her arms around his neck and taking his tongue into her mouth. She moaned in his arms, trembling as she felt something hard poke against her body. 

Her boyfriend’s hands slid down her back, grabbing her by her rather plump, round ass and lifting her right off the ground. Her legs wrapped around his body as she melted in his grip, pushing against his tongue with hers as the two moaned together. 

They soon sat on the soft sands, rubbing their bodies against one another, quietly moaning as they became high on the other’s scent. They were young and their passion was inexperienced, but naturally complimenting. 

Needless to say, as much as Yu liked it, her bikini top didn’t stay on for long.