Mitsuki, a cute and charming office lady, likes to be in control, while Shinomiya, the sweet and elite businessman, wants to be dominated. Although both have shied away from their own desires, (in Shinomiya's case, due to a traumatising ex) they eventually found each other and began dating. Together, they're searching for their own version of good sex. But just as their relationship is deepening, Shinomiya's ex, Saki, suddenly reappears. Can Shinomiya overcome this terrifying ordeal and claim the sex life he truly desires?