Izumi Shio's life in the quiet town of Sainoshi is upended by an off-season school transfer. A beautiful, inhuman being attacks her without warning. Twin werewolves pull her back from the edge. Her brother is hiding something she was never meant to know. And on the night of April 30, as the boundary between the dead and the living grows thin, the love Shio finds in the space between worlds will put her life at risk.