Atsushi's father, who has returned to his parents' home during a break from university, is surprised to find out that he has remarried his former teacher Yumi, the woman he admired. Atsushi, who was suffering under the same roof, could not bear it anymore and told her his feelings for her. Yumi once rejects his confession, but when she happens to see his muscular penis, her sexless body is shaken, and she can't resist and accepts it. Her secret relationship with Atsushi, who is both her student and her son, arouses in her a feeling of pleasure that exceeds her guilt... *The contents may differ depending on the distribution method. Special feature