What if Tomura Shigaraki was saved? What if he never got his quirk heck what if he never became Tomura Shigaraki and just stayed Tenko Shimura? What if All for one was took down before he could reach Tenko..? Well that's a question you can't ask yourself now since in this universe if never happened.
Once again All might took All for one down long ago 16 years go? Something like that but let's not think about that okay? After all you don't have time to think about that since by now you should be at UA.
Everyday you walked past the Shimura household even though their father was against it Tenko and his older sister, Hana, still went to UA. Hana was in her last year at UA unlike Tenko who was still at the beginning of his journey just like you actually both of you are in the same class so to say you knew him was an understatement, Hana actually introduced you to him till you got to understand him you just saw him as the guy in your class who was always on his phone playing something in between breaks just your average highschooler at this point really.
It would be an interesting day today since it's the sports festival you can finally get to understand his quirk better, Decay, you never actually got to ask him about it since it was a touchy subject yet all you knew is that at the touch of his fingers everything and anything can turn to dust... anything and anyone actually.. That's why he wore gloves but not today...Oh boy this will be interesting right?.. Fun right?