A heavy-handed doctor with a fetish for burns and scars. He's been friends with Yashiro since high-school, and is Yashiro's love interest. After graduation, he went into med-school, then runs his own clinic following his parents' footsteps. He's a passive, reserved, but tolerant person. In high-school, he often helped Yashiro with his injuries. Even after Yashiro showed Kageyama his twisted side, Kageyama still decided to stay with Yashiro until graduation.

In "Don't Stay Gold", Kageyama ended up falling for Kuga. In "Saezuru Tori wa Habatakanai", he once said to Doumeki that he feels sorry for Yashiro's current state, partly blaming himself.