"Everyone, hide!" Rantaro shouted to the room where all of their friends waited for Shuichi to arrive. Smiling, Rantaro hid around a corner from the front door, turning off the lights of the home as he heard the car drive onto the driveway. The room fell into silence, only broken by the faint clicking of a clock nearby.
As the front door opened, Rantaro switched on the lights, signalling for everyone to jump out and shout surprise. Shuichi flinched, staring at his group of friends in shock, body frozen in place. "U-Uh..."
Hearing a familiar laugh that could only come from Kokichi, Rantaro turned to the purplette to see him holding one of Shuichi's two handguns. Kokichi had bolted up to the detective, holding the weapon to his head. "What did I do?!" Shuichi shouted, placing his hands in the air.
"Put the gun down Ouma!" Kiibo shouted. They hadn't planned the scenario, so the others were quite shocked at the behaviour.
"This is payback Shuichi!" Kokichi chuckled, lowering the gun and handing it to the detective. "Anyway, surprise!"
"What's all this?" Shuichi asked, only now taking notice of the rainbow streamers and balloons decorating the foyer and surrounding rooms.
"Happy birthday hun," Rantaro smiled, approaching the detective to kiss him on the cheek.
"Yeah, happy birthday grandpa," Kokichi chuckled.
"You're older than me Kokichi," Shuichi rolled his eyes.
"When you are all finished, we have prepared gifts for your birthday Saihara, as per modern tradition," Shinguji Korekiyo informed the male. Rantaro didn't expect him to turn up as the anthropologist looked down upon what he referred to as 'modern traditions'.
"Nyeh, then there's cake," Yumeno muttered, a faint smile tugging at her lethargic lips.
˜*°•.˜*°• 🌹 •°*˜.•°*˜
Birthday gifts covered the living room coffee table, wrapping paper littered the carpet (mainly due to Kokichi balling it up and throwing it at people). Shuichi'd received makeup, edgy accessories, a new watch, flowers, a whiteboard he could use for detective work, a massive gummy bear, and a series of crime novels.
Rantaro had remembered something Shuichi had mentioned months prior and acted upon it. He'd picked up several pebbles from their backyard and painted 'Reasons I Love You' on them, collecting them in a small bag. Shuichi gasped when he realised what they were and planted a deep kiss on Rantaro's lips, encouraging multiple erotic noises from Iruma.
"Thank you all," Shuichi beamed, hugging each of his friends with pure adoration.
"Great, now time for cake!" Kokichi cheered, jumping out of the room. Everyone followed him to find Tojo Kirumi cutting a black forest cake she'd baked earlier in the day. No one saw Tojo too often as she worked as a maid for a confidential, high-profile client. Each person grabbed a slice of cake and ate in the living room together, talking amongst themselves.
Rantaro laughed as Kokichi tried to feed Shuichi who kept denying him out of embarrassment around his friends. "Hmph, fine you meanie!" Kokichi huffed, shoving the cake into Rantaro's face, the latter unprepared.
"Thanks, Ko..." Rantaro sighed, smiling as the cake dropped to his plate.
"Oh, looks like you got messy Mami," Kokichi chuckled, leaning over to lick the frosting from Rantaro's cheek.
"You guys know Shirogane's watching... Right?" Shuichi muttered, staring at the ground to hide his red cheeks. Rantaro glanced up to see the cobalt-haired woman staring at them, lust sparkling behind her teal-green eyes hiding behind her glasses. Shirogane Tsumugi loved anime and cosplaying, but loved drawing questionable comics of scenarios between their friends.
"Yo Sidekick, happy birthday my man," Momota Kaito grinned, approaching the three.
"Thanks, Kaito," Shuichi smiled, hugging his childhood best friend.
"Holy shit, are you three married?!" Momota shouted, grabbing Shuichi's hand to hold up the silver ring. The room fell quiet, everyone staring at the three after Momota's outburst. After Rantaro made his speech and gave the other two their promise rings, the three hadn't realised people would think they were married. They also didn't think to tell anyone, even after the situation at the beach.
Iruma, Akamatsu and Kiibo all burst out in collective laughter, with Rantaro and Kokichi soon joining them. "Gonta not understand the joke," Gokuhara muttered.
"We're not married Kaito, uh, they're promise rings," Shuichi explained, slipping his hand from the other's grasp.
"We can't be like you and Harukawa!" Kokichi chuckled, eyes brimming with malice. "Since we can't have children, we don't have a pregnancy to kickstart a marriage!"
"How rude of you, degenerate male!" Chabashira Tenko shouted from across the room. Kokichi stuck out his tongue in response, flipping off the olive-haired woman.
"Oh, right, Maki at the baby two days ago, right? How's she doing?" Shuichi asked the plum-haired husband. Rantaro tuned into the conversation, interested in the response as Harukawa wasn't present to talk about the newborn.
"She's taking care of him right now. I'm so proud of her, she's recovering well and being the best mother I've ever met!" Momota grinned, glad to have the opportunity to gush about his wife. "We named him Reiichi, he's an amazing son. He's the spitting image of his mother, but he has my eyes."
Shuichi opened his mouth to respond but hollering interrupted them. Turning to the source, Rantaro's eyes widened as Iruma slammed down her glass of liquor and ripped off her shirt, revealing her bra to the room. Sighing, Rantaro pinched the bridge of his nose, closing his eyes and lowering his head as he muttered to himself. "It's one in the fucking afternoon..."
˜*°•.˜*°• 🌹 •°*˜.•°*˜
Shuichi and Rantaro slipped into their nightwear, curling up together in bed, pulling the blankets over themselves. "Oi, are you two really going to bed?!" Kokichi whined, standing in the doorway.
"Uh, yeah?" Shuichi frowned. "It's midnight."
"We have work tomorrow, we kind of have to," Rantaro sighed.
"Stay awake for a bit, pretty please?" Kokichi begged.
"Fine, just for a bit," Shuichi sighed. They watched as Kokichi cheered and shut himself in the bathroom, locking the door. "What's he doing?"
"I have no clue," Rantaro sighed. "Maybe he has a secret present planned? Just humour him at least?" He asked, pulling Shuichi closer to lean on his chest. Shuichi hummed in agreement, the two listening to silence behind the bathroom door. Eventually, Kokichi opened the door and leaned on the frame with a flirtatious smirk.
Rantaro's mouth hung open as he stared at Kokichi, the male now approaching the foot of the bed. Kokichi wore a black lacy lingerie set, complete with strips of the black fabric tied around his body like rips. "You two seem to like this a lot," Kokichi huffed with a smile.
Glancing at Shuichi, Rantaro chuckled at his reaction, face red and eyes gleaming with lust and wonder. "H-How'd you get into that so quickly?" Shuichi asked.
"I've been wearing it all day underneath my clothes," Kokichi winked. Lifting his knees onto the bed, Kokichi began crawling toward Shuichi, their eye contact never wavering. "Is the birthday boy ready for his special present?~"

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90 Day Saioumami Challenge
FanfictionA collection of stories for Saihara Shuichi x Ouma Kokichi x Amami Rantaro. This ship doesn't have enough stories, so here are 90 more. Contains fluff, angst and smut stories. Any necessary trigger warnings will appear at the beginning of each stor...