Manabu Miyoshi

Manabu, more commonly known as "Ga-chan" (がっちゃん?) to his peers, is one of Ren's friends and one of Tsukasa's classmates from middle school. His cousin owns a café, where he works to earn money to visit his senior Ritsuko. He notices Ren's feelings for Ninako early on and desperately tries to pair them up.