2021 Onseshot Book!

Post Game AU!Saiibo: Who Are You?

(A/N): This one shot is meant to be in like with a Post Game AU created by Flaming_SaiiboAce , so if you're curious for more AU details, check out their book explaining it!

I tried to stay as close to their AU as I could, but I may have unintentionally made a few changes to better suit the one shot. Sorry about that!

That being said, Kiibo is called Tetsuya in this AU, calling him Kiibo confuses him greatly. Characters call him Kiibo either because they wanna mess with him, or more likely because they don't know better.

P.S.: The comic has nothing to do with the AU; I just thought it was funny.

Warnings: Amnesia, implications of abuse, self negativity, mentions of blood

I'm Tetsuya Idabashi... I'm a human... I'm not a robot... I'm my own person... I think-

Tetsuya was startled out of his daze by frantic knocking at the door.

The white haired boy looked up expectantly at the man sitting across from him, tinkering with a simple wristwatch.

"Hm?" Professor Idabashi looked up from his project. "Tetsuya, would you mind checking who that is? If I put this down, it may burst into flames." The scientist chuckled nervously. (A/N: I wasn't entirely clear where Tetsuya lived in this AU, so for this one shot, he lives with Professor Idabashi, who is actually his dad, I hope that's alright!)

Tetsuya nodded, getting up from the table. "Of course, Prof-Father." He still found himself getting the man's role in his life confused because of his jumbled heap of memories.

He walked over to the door and opened it, only to be met with... "Saihara-kun?" He frowned. "It's been..."

"Over a year. I-I know." The thin young man finished nervously, his greyish eyes flicking from side to side as if he was worried about being followed. "U-um... I need somewhere to stay, just for a day or two, a-as soon as I get a job, I'll be out of your hair; I promise!" He hastily wiped his nose, which Tetsuya just noticed was violently bleeding.

Tetsuya's frown deepened. He needs to stay here? Why is he coming to me after so long? "Just... let me ask my father first..." He decided on staying.

Shuichi nodded fervently, leaning against the side of the door as Tetsuya reentered the house.

"Uh... you can come in for now, if you want..." The shorter boy offered awkwardly, not wanting to seem rude for leaving the blue haired boy outside.

"Huh? I... can?" The detective seemed genuinely confused at the invitation, which concerned Tetsuya slightly.

"Well... it's better than just standing outside, right?"

Shuichi gave another wordless nod, stepping inside and practically collapsing on the couch.

It was only then that Tetsuya fully began to notice how... strange Shuichi was. He shows up at his house out of nowhere covered in bruises with blood staining his dark, collared shirt... there was definitely something going on, Tetsuya decided.

"P-Father?" Tetsuya went back into the dining room.

The inventor paused his tinkering. "Tetsu? Who was at the door?"

Tetsuya bit his lip. "Remember when I was in Danganronpa?" That was a stupid question. Of course he remembers. He mentally scolded himself.

The middle aged man's expression darkened. "What about it?"

"Remember the Ultimate Detective?"

Idabashi perked up. "The boy who ended the whole show? Sure, I remember him."