Kouhei Akagi

Kōhei Akagi (赤城 浩平, Akagi Kōhei) is one of Kyousuke Kousaka's classmates and the older brother of Sena Akagi. Unlike Kyousuke who has a complicated relationship with his younger sister, Kouhei is a supportive brother to Sena, despite her fascination to hardcore yaoi and he prods Kyousuke about his relationship with Manami Tamura.