“Suck my dick obediently, you’re really masochistic.” Marina Shirai joined an IT equipment sales company in Tokyo and was promoted to department manager. However, she was overwhelmed with stress due to excessive expectations at work, training from incompetent subordinate Yoshino, and being coldly treated by her husband at home. Then, Yoshino accidentally noticed her masochistic nature hidden deep in her heart. Then, Yoshino would call Marina to an SM hotel during lunch breaks and train her as a submissive bitch who feels pleasure even in pain, reversing their positions at work...