Your school had prepared a small summer camp in which they took your class to the swimming pool to have a relaxing day there. You were good friend with a boy named Senjuro Rengoku. He was the quiet/hated kid while you were the popular kid in your class, though the two of you made an unbreakable bond together. You were about to go change into ur swim suit when you noticed something...

There is a crowd surrounding the pool. You go over to see what happened. Your eyes widen as you see your friend drowning while the group of the 3 most meanest kids in your class, who purposely pushed him in, laugh while mocking him. The horror on your face only grew as you realize that he can't swim.