i am a plaything.

Hyo-min, who became a prostitute by choice, undergoes sex training to serve clients under the supervision of Kyeong-seop, the manager of the establishment. She services countless men and even learns advanced techniques directly from Kyeong-mi, who works with her. Meanwhile, Kyeong-seop gradually opens his heart as he discovers the reason behind Hyo-min's decision to enter prostitution.