"I finally had the place to myself..." mumbles Masato, who's been asked by his mother's friend, Sakiko, to watch the house while his parents are away on a trip. Initially reluctant and filled with discontent, he gradually finds himself drawn to Sakiko's mature charm as they spend time together. One night, unaware that Sakiko is in the bathroom, Masato opens the door and catches her in a shameless state. Overcome with arousal, he chases after her as she rushes back into her room in panic, pulling her into a forceful embrace... An erotic tale capturing the fleeting moment when mutual desire begins to bloom into an adult romance.