Aya and Nanako met at a women-only SM club. Aya, a customer, liked Nanako, who was a masochist, and frequented the club. As they continued to play together, they became attracted to each other and started dating. Nanako understood that Nanako would play with other customers, Nanako when Nanako found out that she had also gone to another SM club out of loneliness, Aya's roles were reversed, and Nanako began humiliating Aya with the play that Aya had been using. Things gradually escalated, and she found herself bound by Nanako in body and Kokoro .