"I loved my son as a man." Natsu, a mother who goes to Tokyo once a month to take care of her only son who went to Tokyo to attend university. Feelings for my son that I can only understand when I'm away. It didn't take long for the unusual parent-child love that I had been holding for many years to turn into heterosexuality. This cannot be forgiven. I have to return to normal parent and child as soon as possible ... But what should I do now ...? After all the worries, Natsu decides to go to Tokyo again ...