Yui conducts research activities in an unofficial unit. She follows a strange case of young women dying mysteriously one after another. She eventually finds out the existence of the "pleasure drug" and the organization behind the incident. She tried to infiltrate alone, but she was Yui, but she fell into a trap and was confined. Boss, who is frustrated with Yui who does not break her mouth even when she is unfolding humiliation, administers "pleasure drugs" one after another.
