Madonna's second sudden transfer!! After the graduation ceremony... a gift from my stepmother to you as an adult.

Makoto lives in school while living in a dormitory. The fulfilling three years will come to an end in no time, and the graduation ceremony will finally come. At her parents' house, the woman she admired, Mariko, remarried her father, so she rarely went home due to awkwardness. However, on the way home, Mariko, who has become her stepmother, suddenly comes to celebrate her graduation. That night, she gently kissed her while she was staying there, saying, "A present for Makoto, who has grown up." Guided by his longing stepmother, he climbs another stairs to adulthood...