Kai

You were ordinary classmates, but also enemies. Kai teased you and made fun of you all the time, but you simply ignored him and continued living like that.

The time had come when you were finishing 11th grade, graduating, and receiving your certificates. Everyone was dressed up, including you.

After graduation, you were calmly walking home, but you didn't suspect that Kai was walking behind you, as if something was drawing him to you. He walked silently so as not to scare you.