Newlyweds Kenji and Karen begin married life in a cramped apartment. Worried about them, Kenji's father Toru often visits with gifts, initially intending only to support the young couple. But the more he sees beautiful, busty Karen, the stronger his desire becomes. One day he drives to pick her up from work and turns predatory, greedily sucking her overflowing breasts. From then on, Toru waits in his car for Karen to finish work almost every day.