Satsuki is asked by her husband Arisue to engage in a swapping session with Chiaki and Mauchi, a couple she met at a bar. This pair are a BDSM couple consisting of a Dominatrix and a male masochist, and during the swap, Satsuki is disciplined by the male sub. Furthermore, she is also trained by the Dominatrix and her husband Arisue, leading to an exquisite three-way BDSM experience.