College student Ryo Mizuki works part-time at an SM club for financial reasons, but in reality, she isn't naturally dominant—she actually has a submissive side. One day, while on her way to work, she's suddenly struck by severe stomach pain. She rushes to the restroom, only to find it out of order due to water shutdown. Desperate, she hurries back to the club, but her schedule is already fully booked with clients. Trying to endure the pain during her session, she eventually reaches her limit and uncontrollably defecates in large amounts. In that instant, the power dynamic flips—Ryo transforms from dominatrix to obedient submissive, following every command from the client. What fate awaits her from this moment on?