“Here’s your reward, Manager—I’ll make you suffer even more.” Yuki is a sales manager at a Tokyo office-equipment company, crushed by work pressure and frustrated by her unmotivated employee Yoshino. One day she gets drunk and lets her guard down in front of him, leading her to discover her own masochistic desires. Yoshino begins summoning her to a BDSM hotel during lunch, giving her pain with wax and whips and pleasure with his cock. Away from the office, he trains her into an instinct-driven submissive who craves the suffering...