What if you were given the chance to return to the past and rewrite your life? For Takemichi Hanagaki, an unremarkable 26-year-old man stuck in a cycle of monotony and regret, this fantastical notion becomes an overwhelming reality. Bullied at school, undervalued at work, and living in a dingy apartment, Takemichi is far from anyone’s idea of a hero. But everything changes the day he learns about the tragic fate of his middle school girlfriend, Hinata Tachibana. Murdered in a gang-related incident, Hinata’s death sends Takemichi spiraling into despair—until a chance encounter sends him 12 years into the past.