Nina, who became Yusaku's new mother through his father's remarriage. Yusaku was quickly attracted to the kind and sensual Nina. He wants to somehow close the distance with Nina. Then, good news arrives that his father is going on a three-day business trip. He can be alone with Nina, whom he has always liked... He wants to use this opportunity to quickly build an intimate relationship, but he is troubled because he can't think of any concrete means...
