Sakura, the adult childhood friend of his son, left the countryside for Tokyo and returns for summer transformed into a gorgeous tease. Though he has always regarded her like a daughter, she presses against him in barely there clothes and whispers filthy words in her anime-like voice. His reason melts against her young adult body, slick with sweat and arousal, and one impulsive fuck begins a summer in which she keeps draining him again and again.