Haru was in love with his friend and archery rival Reiichirou which caused him to struggle with his bow. In the end he quit archery and left to study somewhere else without contacting him again. Four years later he is a teacher and at the school he teaches at is Tsukasa, Reiichirou's younger brother. Tsukasa had always been in love with Haru but never said anything until now.
Kimi Ga Koi Ni Ochiru