Hiroshi, who has been dating his girlfriend for half a year, visits her house for the first time and is captivated by the beauty of her mother when he greets her there. He learns that her family is a single-parent household, and that her hardworking mother works multiple part-time jobs to make ends meet... After that, Hiroshi leaves her room and goes downstairs. As her mother takes a nap on a cushion in the Japanese-style room on the first floor after her part-time job, he is drawn into her long skirt and begins panting...!