inagine aizawa finds shinsou on the streets and spends months just gaining his trust. aizawa adopts shinsou and trains him. shinsou makes it to yuuei and aizawa couldnt be prouder if *his son*.
aizawa would come home and vent to shinsou about all the class trips, other teachers, basically anything hed tell shinsou. well, when aizawa went on a rant abt the traitor, he started to notice smt. everytime he told shinsou abt a class trip, and lesson plans, villains would somehow be there to ruin it. aizawa put it aside, trusting shinsou would never betray him or yuuei.
well, during a huge fight with the lov he notices shinsou went missing. he goes looking for him, scared that the villain got to him. instead, what he finds is shinsou, standing side-by-side with izuku, brainwashing any hero or student he can while izuku knocks them out as they get close.
anyways, basically a shindeku, dadzawa, traitor au, and a whole lotta angst.