Devil 17 - After School Battle

Amidst a terrorist attack that claims the lives of all his classmates, Tohru Kuroe is driven to pick up an abandoned gun to prevent another woman from dying. In that moment, a dormant beast within him awakens and takes control. When Tohru finally regains his senses, he discovers he has become a killer. He soon learns that he was genetically engineered for this purpose under the codename D-17. Now, Tohru attempts to maintain a semblance of normal life while fending off challengers who threaten both his existence and the safety of those around him.