★━…‥ The two of them decided to go to her hometown during winter break. The protagonist, Hitsuji, and his girlfriend, Hina, plan to let loose in a place where no one is around. "I wish she would become a boy and hold me." Hitsuji, who is excited about the trip, strongly wishes for something that he usually keeps to himself. If only his lively and cool girlfriend, who always holds his hand, would hold him--. He thought it would never happen... The next morning, he woke up to find Hina with a male genitalia, stunned. And I had a girl's thing... She knows the girl's body inside and teaches him the most pleasurable sex. Before I knew it, I had been asking her. "Raw... give me semen in my uterus." ★━…‥ A fantasy manga in which the genitals of men and women are reversed. It's full of lovey-dovey sex.