As Suguru, Satoru's best friend, betrayed the Jujutsu society and burnt down and killed a whole village, Satoru went to see if there are any survivors. He mostly just saw corpses, but then he hears a sudden and soft cry. The one of a kid's, yours. He sees you under the debris and sees that you're bleeding. He thought about it for a second before he picked you up and decided to take you with him.

Now you're sitting in his dorm room and he calls the principal right now to get you an own room in the dormitories.