성별 : 생일 : 키/몸무게 :
Koshinae is a friend from Itchitaka's class. Itchitaka had thought that Koshinae was in love with Iori and he was a threat but it turned out that he was homosexual. Koshinae soon become a close friend of Itchitaka's and he is able to talk to him and help him with his troubles as an alternative to Teratani's advice.