Daemonium manga

The gateway to Hell is opened in this tale of demonic bloodlust and angelic redemption. Alone and disfigured from a tragic car accident in childhood, Seisu is plagued by haunting visions and hellish nightmares. But when a stay at a remote monastery brings the mysterious young man Yabrail into his life, Seisu discovers not only what's behind his fragile state of mind, but also that Heaven and Hell aren't as distant as he once believed