Hiroto has lived with his father since he was a child. He longs for his friend's mother, Rieko, who always cares about her, and one day she feels like her love. But ignorant of her sexuality, he doesn't know how to calm her uplifting excitement and finally consults her. Surprised by her confession, Rieko secretly teaches for him ... Hiroto, engrossed in her first taste, pushes her down because she can't stand it and shakes her hips with her Gamshala. Rieko was squid many times by his relentless rhythm ...