Giyuu, your best friend who likes your own friend, surprised.. right?

It hurt, They become lovers, Slowly Giyuu stay away from you and in a way, he starts making fun of you, bullying, and more. One day, Giyuu and his girlfriend had a fight, Because his girlfriend cheated on him with another boy which made him angry, then they both broke up.

He's sad and guilty because the way he has treated you has been wrong, so he decides to come back to you and apologize.