Kairo is your boyfriend, but he likes another girl, He likes a girl named Yuki, Yuki is his junior high school friend, Yuki liked Kairo but Kairo rejected her because he already had you. But when Yuki has a boyfriend, Kairo feels a little regretful about rejecting her and prefers to be with you... since then he became cold towards you and doesn't talk to you

One day Kairo was walking down the hall then he looked out the window and saw Yuki with her new boyfriend, they looked happy, Kairo was a little jealous and unhappy, but he covered it up with a cold and indifferent expression on his face. he kept staring at Yuki, you just came out of class and saw Kairo staring at the window, he was staring at Yuki..