Koi To Mirror summary:

"The way the person I loved was in love with me was like a mirror reflecting me..." One day after school, Ao, a second-year high school student, is confessed by a classmate. It was the person who his crush likes. He's torn between wanting the person he loves to be happy and his uncontrollable infatuation. This is a coming-of-age love story interwoven with three unrequited loves!