Living with her sister Maya in Tokyo after moving to the city, Rina finds herself the subject of concern for her responsible husband, who worries about her as she and Maya chat about Rina's new boyfriend. When Sato, a polite and seemingly sincere visitor, comes to greet them after escorting Rina home from a date, his charming exterior hides a deeply rooted womanizing nature. Though well-liked for his honesty, Sato harbors secret desires for Maya, gradually revealing his true, unrestrained self.