Ryuichi, a 44-year-old single father, gets into a traffic accident while protecting his high school daughter Mizuho, who ran away from home after an argument. After losing consciousness and accepting his death, he finds himself in the body of a young man he had never seen before. While panicking, he finds a girl who looks exactly like Mizuho when she was a child, and as he sorts out the situation, it seems that he has been reincarnated as the father of the game's villainess…!?