A girl reaper is depressed because she can't take a human soul for some reason (I believe it makes her remembers her past life). So a her cat familiar tells her to go and take a soul of an old man. The old man tells her that he wishes to go back in time to ask out a girl because he loved her. The last time he saw her, she was killed. They have sex and it turns out she was the girl. afterwards he dies and she wishes for him to be alive and that familiar reminds time to make it so they live and married each other.