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.
Da-som coincidently finds Do-Hoon's old ID on the floor. She later returns it to him asking some questions. Do-Hoon then decides to tell her about his painful past, and so she feels guilty about asking questions and hugs him. MC uses this situation to invoke jealousy into Mrs. Lee Sohee. The latter leaves them all alone for a work meeting & the work mates don't waste any time and they get straight to fucking.
Do-hoon, So-hee and Da-som all go on a business trip together. while preparing for the seminar in a empty room the MC pounces on his boss So-hee promising it'll only be oral sex to then breaking his promise and having it all the way.
Do-hoon (MC) finds out that his charming and respectable female boss (Mrs. Lee Sohee) is actually his high-school bully's mother, so in a moment of rage upon seeing his bully in flesh he decides to take revenge. In doing that he decides to tame the bully's mom sexually. So, he makes his move and pounces on her at the workplace late at night.