It's been a year since my father, who went on a solo assignment, hasn't returned. - Her mother, Natsumi, is acting dignified, but it was painfully conveyed to Yuta that she was really lonely. How can I, as a son, comfort my mother? The days went by without being able to find an answer. At that time, Yuta witnesses Natsumi indulging in masturbation and sobbing after finishing up. Yuta, who witnessed his mother's sad appearance, made up his mind. It was to hold my mother instead of my father.