Seidou Takizawa was a young ghoul investigator, who had recently been assigned and moved to the twentieth ward, bringing with him his girlfriend, and hope to start a life. Those hopes are dashed, shattered and left to die as Seidou's life turns to hell. Over-working himself, abused by his girlfriend, and constantly being insulted drags the young man into darkness, though there is one thread still intertwining him with the light. His love for Natsumi Miyasato, a colleague of his. Can Natsumi bring Seidou back into the light, and keep him there? Or will he subside back into the darkness?