Kazuya goes to live with his mother Shinobu because his father, Yoshiki, who works in the same company, has fired him according to the company policy regarding redundancy. However, Shinobu soon gets remarried to Sakamoto depriving Kazuya of a place to stay. He then meets Sachiko who works in a salon where sexual pleasure is offered to men. They promise to have a date on the next Sunday by the sea.
