After Sun-Young misses a proposal deadline and gets Ho-Jun reprimanded by his superior, he takes punishment into his own hands. During overtime, he spanks her and orders her to wear a vibrator for a full day.
Sun-Young asks her superior Ho-Jun to train her in a Master-Slave BDSM dynamic. His first command is for her to wear a vibrator while walking around. His second command is for her to perform oral sex on him under a table. She keeps his ejaculate in her mouth for the remainder of the workday, which immensely satisfies him. He then rushes her home for an intense sexual encounter.
The more she tries to forget about it, the more Yumi ajumma thinks about Jaejun's cock, as though she wants more. Acting as if nothing happened, but Jaejun is not buying it, as if he can read her mind. Knowing her true intentions, he gropes her and gets her on the edge before ultimately stopping, letting her beg for it through her own volition.
Mrs. Lee So-hee feels very uncomfortable after running into some unknown man who seems to know about So-mi. So, Do-hoon comforts her with some hot sex. Do-hoon interrogates So-hee during sex, and after a few spankings and hair pulls, he figures out the identity of the unknown man, and it turns out that he's the father of Mrs. So-hee's kids.
While Tae-Yang and Vior are talking, their peace is shattered when two debt collectors, Gardner and Iyo, barge into the shop. When Vior can’t pay up, they start trashing the place. Tae-Yang steps in to stop them, easily dodging Gardner’s clumsy attack and knocking him back. He then subdues Iyo, demanding she pay for "damages"—specifically for re-opening his wounds during the scuffle. Since she has no money, Tae-Yang decides she can pay with her body instead, taking her virginity right then and there and finishing inside her as a means of "training" her.
