Because Nagatsuma knows he is in love with Aoi, he makes the hard decision to break up with—to betray—Aoi. Burdened with a painful wound no one can see, Nagatsuma is assigned to Section Zero, a division of the police force tasked with handling investigations of a paranormal nature. However, the young man sent to collaborate with them knows of Nagatsuma’s relationship with Aoi. Will he keep this information to himself or use it to his advantage?