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.
Siwoo takes peeks at Naeun filming racy content for her secret account in an empty lecture room, he later raids the room and protects her from getting caught. When the strangers leave, he makes a bet with her, and if she loses, Naeun becomes his slave for life.
