"Mizuki" works as the No.1 bunny girl at a night shop. One day, a certain event causes the owner of the store to change. At the same time, a woman, Suzuka, who seems to be an acquaintance of the new owner, appears and says, "I will run this store as No.1." "Suzuka" with a cheeky attitude and "Mizuki" who confronts it. That triggers the two to compete in sales. On the condition that the loser swears absolute obedience to the winner... The sales battle involving the store's colleague Bunny and customers is overwhelmingly won by "Ryoka". As promised, she orders Mizuki to become a slave.
