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…!?