One day, Aika was suddenly kidnapped and was destined to be sold as a slave. Saeki, a veteran trainer of a human trafficking organization, mercilessly trains Aika. Rookie trainer Minami trains Aika by imitating what she sees, but she is mentally immature and ends up just hurting her... Unable to stand by, her mother Kaori scolds Minami, but her rebellious daughter doesn't listen and continues to train her as a "game". Saeki hopes that the rookie trainer will awaken along with the rare talent of a sex slave.