Okay so kinda like an au where Aren has a niece named Usami
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Third person pov
Kaidou was currently sitting on Arens lap. They were just flirting back and forth, making the other flustered. Until they heard a knock at their door."I'll get it" Kaidou said getting off of Arens lap. Kaidou opened the door to be greeted by Arens [in au] sister. "Oh hey [insert sister name]!" Kaidou said smiling.
"Hey Kaidou!" She said walking inside. "Hey Aren!" She said waving. "Hey [insert name]! Hey Usami!" He said as the young girl ran over to Kaidou. "Oh hey Usami" Kaidou said softly smiling.
"Can you guys watch her for about an hour or two?" She asked. "Yeah of course we can" Aren said smiling.
"Okay great! Okay Usami I'll be back later!" She said waving.
Kaidou went to close the door and lock it. When he turned around he saw Usami looking up at Kaidou with grabbing hands.
Kaidou picked up the small girl and walked over to the couch where Aren was sitting. Kaidou sat down and put Usami next to him. The young girl cuddled up against him.
"Hey Usami!" Aren said waving at her. She looked scared when he started talking.
"Am I that scary?" Aren asked sitting next to Kaidou.
"I wouldn't say so. But if you ask a 5 year old girl then yes. Maybe it's cause your so tall compared to me." Kaidou said
"I'm not that much taller!" Aren yelled as he turned the tv on.
"Wanna watch a movie Usami?" Aren said looking at her. The girl just cuddled into Kaidou scared.
"What did I ever do to that girl." Aren said genuinely getting pissed off. "Relax Aren shes just a kid." Kaidou said kissing his cheek.
When Kaidou looked over he saw the young girl sleeping. "Do I put her in our room or the guest room?" Kaidou asked as he picked her up.
"The guest room, it's closer so if she wakes up it'll be easier to hear her." Aren said quietly.
Kaidou nodded and walked over to the guest room. He placed her on the bed and put a blanket over her. He slightly closed the door and walked out.
"She's asleep." Kaidou said as he laid his head on Arens lap. (Idk why I just came up with the random idea that Kaidou plays roblox and bullies little kids. He even has that stupid bear avatar.)
"Well now that she's asleep wanna watch a movie?" Aren said playing with Kaidous hair. "Hm sure" Kaidou said as he sat up. He laid his head on Arens shoulder.
Swaggy time skip
Kaidou had fallen asleep in the middle of the movie. He was woken up by the sound of a knock at the door. "You wanna get it or should I?" He asked as he yawned. "I'll get it since you got it last time." Aren said getting up and walking over to the door.
"Oh hey [insert name]! You here for Usami?" Aren said smiling. "No Aren im here to take your boyfriend out. Of course I'm here for Usami." She said smiling.
"You better not take my boyfriend out. He's to cute for you anyway." Aren said also smiling. "Wheres she at?" She said walking inside the house.
"Guest room. She should be asleep." Kaidou said walking over. "Alright thanks." She said walking over to the guest room.
She walked out with Usami in her hands. "Thanks for watching her on such short notice." She said as Usami waved.
"It's okay! We can watch her anytime." Kaidou said smiling. "Okay well we're gonna get going. Say bye Usami." She said waving, setting an example.
"Bye Adiou!" She said not knowing how to pronounce his name. "Bye Usami!" Kaidou waved. "Damn Aren you don't even get a goodbye but your boyfriend does." [Insert sister name] said laughing. Kaidou began to laugh as well.
"Haha very funny. Bye Usami." Aren waved.
I have a smut story coming out 😋

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Kubokai One-Shots 🏳️🌈✨ (slow updates)
Short StoryThere's no smut! But fluff and a maybeeee a bit of angst!