Beautiful transgender woman Tenma Sakuranomiya, who loves both men and women, sets her sights on having sex with a gorgeous female doctor at an anorectal clinic. During the examination, as the doctor performs a rectal check, Tenma's penis suddenly becomes fully erect... Noticing this, the doctor is surprised yet intensely curious. How can such a beautiful woman have a penis? Strangely, she finds herself aroused. Faced with Tenma's erect penis, the doctor hesitates but ultimately gives in and accepts him...?!