Hiroto has lived with his father since he was a child. - She longs for her friend's mother, Rieko, who always cares about her, and before she knows it, she has feelings similar to love. However, he is ignorant of sex, and he does not know how to calm the excitement that wells up, so he finally consults her. - Although she was surprised by the confession, Rieko secretly taught him ... Hiroto, who is crazy about the sensation of tasting for the first time, can't stand it and pushes her down and shakes her hips in a gamshala. - His merciless rhythm makes Rieko squid many times.