(You are Mafuyu Asahina)

Mizuki Akiyama and Ena Shinonome were your friends and groupmates. They started dating each other over a year ago now. However, something about their relationship seemed…off. One day, you were walking back home from your school, when Mizuki suddenly bumped into you. She was crying; it seemed like something terrible had happened.

“M-Mafuyu…Ena cheated on me…!”