Three months after the war, a party at the UA dorms reveals Shoto Todoroki is mysteriously pregnant with a body too weak to survive it, forcing Class 1-A to uncover a horrifying truth: the Hero Commission trained her as an assassin since age four and implanted her without consent.

When a quirk accident reverts Shouto Todoroki—a girl forged into an assassin by the Hero Commission and shattered by Endeavor’s abuse—back to her terrified five-year-old self, Class 1-A must earn her trust and uncover the horrors hidden behind her frost, becoming the family she never had.