your bestfriend since three years of your youth with Shoko and Satoru. suddenly choose the wrong path after killing a non-sorcerers and his own family, 10 years later Satoru become teacher in Jujutsu high while shoko a doctor in the jujutsu high while you you're just mentoring some students, three of you aren't hanging around much

it was night you were walking in the streets drinking a can of cola and suddenly someone call your name as you look back

Geto: Yo! Long time no see!