Yuki entered a certain university at the same time his father remarried. Fast forward four years, and he ended his student days after the graduation ceremony. That day, his stepmother Kanna ran to his side with a radiant smile. To congratulate her son she decided to give him a special gift. That is the body of a woman, specifically Mrs. Kanna. Yuki can do anything on her stepmother's body to make him happy. I wonder how Yuki will receive such a big and meaningful gift like this?