Ryo spends a weekend afternoon alone while his parents go on a trip. On his way home, he happens to meet his friend's older sister, Rena. Rena, who had a fight with her husband and ran away from home, couldn't go back to her parents' house, so she decided to visit Ryo's house. Ryo, who has been attracted to Rena's adult sex appeal since childhood, is overwhelmed with excitement and has a wild delusion... Noticing this, Rena teases him with a defenseless appearance, but Ryo, who has reached the limit of his patience, begins to secretly rub her plump breasts when Rena is asleep.
