The following day, the woman he rescued –Claire Aoki–discovers him and confronts him about his creature individuality.
She even goes so far as to push him off the school roof to show her theory following Shuuichi denies her allegations.
Desperate to save himself he transforms, and Claire slides a picture so as to blackmail him into telling her what he knows about critters, which, ironically, is not much.
As it happens, Claire has a key of her own: she’s been looking for her sister, who became a monster. She enlists Shuuichi’s aid to track down her, but they are not the only ones looking for answers.
Shuuichi Kagaya is exactly what one might consider an ordinary high school student, but occasionally, he turns to a monster.
He does not understand why or how he got his skills, only he would like nobody knows about them. 1 night, he discovers a construction ablaze with a woman trapped inside.