Makoto Kubota drifted through life, avoiding seriousness or deep self-reflection. His position as leader of the Izumo Group's youth gang kept him comfortably busy with yakuza conflicts, mahjong, and assassinations... Until the day he encountered a peculiar drug known as Wild Adapter, which causes bizarre side effects—including death. Permanently altered, Kubota becomes involved with a drifter named Minoru Tokito, and the pair develop an unlikely bond that pulls them further into the mystery surrounding Wild Adapter...