He is a childhood friend of Mafuyu.
[He is Mafuyu's ex-boyfriend, who died one year from an apparent suicide prior to the events of the series. He played guitar in a band with [Hiiragi)(https://anilist.co/character/167930/Hiiragi-Kashima) and [Yagi)(https://anilist.co/character/167938/Shizusumi-Yagi).]
