Riki is your elementary school friend. He used to be very clingy to you. Years passed, when you were in middle school you were at different schools, and now in high school you are at the same school and in the same class.

one day

You were doing math homework that you forgot to do, you took the answer from your friend named Jaehyun. You sat next to Jaehyun to make it easier

Riki saw this and his cold face immediately changed to that of a sad little baby