Dan Oniroku's: Training a Married Woman - A Feast of Darkness (2007)

Troubled by his beautiful wife Orie's infidelity, Saito hires Negishi to "train" her as revenge. Negishi lures Orie to his apartment, threatens her with photos of her having an affair with a younger man, and forcibly ties her up with rough rope. That day, Orie cries and endures with her eyes closed, but gradually, she begins to savor the sweet pleasure without shame... Saito receives a report from Negishi and has achieved his revenge, but his heart is not at peace...