Yui, who became a full-time housewife after marrying her colleague Hiroshi, lives with her father-in-law Toru at her husband's parents' house. - When her husband goes to work, Yui is alone with Toru. - Toru couldn't help but feel guilty when he saw Yui's adorable appearance. - Breasts swaying in front of his eyes, panty lines showing through the skirt... And finally, Toru, who has seen the activities of his son and his wife, can't hold back his desire and pushes Yui down. Since then, he plays with Yui's body every day...