Synopsis
Shuuichi Kagaya seems like an ordinary high school student, but he harbors a strange secret: he can transform into a monster. Not knowing where his powers come from or what they are for, he tries his best to keep them a secret. During a fire, he shifts into his monster form to save a trapped girl, but in the chaos, he drops his phone. The next day, the girl he saved, Claire Aoki, finds him and accuses him of being a monster. After he denies it, she pushes him off the school roof to prove her suspicion. To avoid hitting the ground, Shuuichi transforms, giving Claire the chance to take a picture. She uses the photo to blackmail him into sharing what he knows about monsters, even though he does not know much. Claire has her own agenda: she is searching for her sister, who also transformed into a monster. She enlists Shuuichi’s help, but they are not the only ones looking for answers.