Jin-Hyeok & Ji-woo go all frisky in the classroom, while lecture is going on & next to Do-yun. Do-yun is pissed!
They have sex in the classroom (Finally)! Do-yun is pissed & is blowing his steam off with some girl who has piercings.
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.