Mizuki, the top bunny girl at a popular night establishment, finds her world turned upside down when the club's ownership suddenly changes hands. Enter Ryoka, an acquaintance of the new owner, who boldly declares, "I'll be taking over as the No.1 girl here." Clashing with Mizuki's defiant refusal, their rivalry escalates into a high-stakes sales competition witnessed by fellow bunny girls and customers alike. In the end, Ryoka emerges victorious in a crushing defeat. True to the agreed terms, she commands Mizuki to become her sex slave, forcing her into absolute submission.