Dae-U finally gets his hands on Yu-Ri by "comforting" her after her teary breakdown. he doesn't waste time and gets straight to the raping right before Su-Heon's eyes who's been peeking glances at them like the cuck he is.
Bora is annoyed that she keeps running into her ex-boyfriend and hates that she still misses him. So, she drags into a motel to fuck all day. Shagging was so good had her forgiving him mid sex. (Post-Breakup sex)
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 reveals his true identity to Ye-eun (his other bully in high school) making all her fears come true. So, she tries to silence him by offering money & a sincere apology but that's not what interests our MC, so obviously he wants to have his way with her in a meeting room using her filmed bullying acts projected on the room wall as a threat.