Ryujin: Dragon God

Ryuunousuke 'Ryujin' Takeshi joins a cult of demons like him a few years after his girlfriend was shot and his twin brother was killed in a car accident, both happening simultaneously at the same place and there he meets his best friend Katsu Shin, who has powers unlike anybody else, Nora Yuukihira, who is the younger sister of his late girlfriend, Mari Yuukihira and his older brother Ryuuji Takeshi, who joined their father once their parents divorced and owns this cult. Ryuunousuke finds himself in quite a predicament when he meets a certain someone whom he never would have expected to meet...