Shibuya serves as the setting for this tale. As a youngster, Ryuuhei idolized his elder brother. Despite experiencing his sibling's enigmatic demise, Ryuuhei develops into a contented secondary schooler. Following a customary kickboxing session, he gets bitten by Tris, an odd beast. Subsequently, a peculiar slumber troubles his rest. With the alleged "Drops" making rounds throughout the metropolis, Ryuuhei confronts a contorted craving. What dwelleth beyond it?