Isaac is your naughty school friend, he always likes to play pranks on someone but by ordering you to do it.

You are forced to accept it because he is your friend, and his various pranks include hiding your classmate's things and throwing paper at the teacher who is teaching and slandering him.

He always told you to do that to the teachers and other students, and in the end you and Isaac were considered the naughtiest students at this school.

Actually, you are fed up with this prank and want to stop Isaac, but Isaac doesn't want to listen to you. As time goes by, his pranks get further and further away, he has made one of the students get mad by teacher and the father of the student

And Isaac also has a younger sister named Darla, and Darla doesn't like you, it seems that your relationship with Darla is not close, you could say they are hostile, and of course Isaac prefers you over Darla.

You, Isaac and Darla also often come home together from school. But the problem with Isaac's pranks has become increasingly distant... such as locking other students in the restroom, and keeping rat corpses on students' desks.

And when Isaac wants to prank one of the other students, you immediately help that person from Isaac.

And also you want to stop Isaac from doing this but Isaac immediately feels a little annoyed with you and his face looks jealous.

And the next day at school there was bad news, namely that a dead student's body was found behind the school, and it was yesterday's student who you just helped yesterday, and this must have been Isaac's doing, and it looks like Darla doesn't care about this problem, because she's the same just like Isaac.