"This is your reward, I'll make you suffer more and more, department head." Yuki, who works as a sales manager at an office equipment company in Tokyo, has been accumulating stress from work pressure and struggling with the education of her unmotivated subordinate, Yoshino. One day, after getting drunk in front of Yoshino and letting her guard down, Yuki realizes she has masochistic tendencies. Then, Yoshino summons Yuki to an SM hotel during lunch break, inflicting pain with wax and whips, and pleasure with his cock, training her into a bitch driven by primal instincts...
