All of them got a vacation after Si-Yun scored great on Mock Exams! Its a Villa with a Swimming Pool. Ji-Hyeon is the 1st to strike Si-Yun & they have sex while, Su-Min is listening them having sex, standing outside the room. She is also getting turned on & starts fingering her pussy!
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.
Do-hoon meets up with Seo Ye-Eun at So-mi's workplace (Caffe) to discuss the latter's relationship with her father to furthermore understand her psychology. When Do-hoon gets his answers Ye-Eun tries to leave but he doesn't let her go and punishes her for putting him in a bad situation (That's his actual reason for the meetup). It turns out that she came to the caffe commando as he asked. While they were kissing, Ah-young (So-mi's little sister) happened to be at the caffe with a friend, when she saw Do-hoon, she follows him and takes peeks at him and Ye-Eun kissing. Do-hoon notices people's noise just outside and rushes upstairs to continue humiliating Ye-Eun.