Do-hoon makes Ye-eun attend the shoot afterparty where she drinks too much and gets drunk and dozes off. She awakens all tied up to Do-hoon who's about to torment her and make her submit to him by violating her asshole.
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.
After having sex in the empty classroom during lunch time, the siblings came back to the lecture hall & Taesung started fingering his sister during lecture. He made her so horny that she had them hurry back home to fuck where Haeun grants her brother his wish of fucking her backdoor for the 1st time in her life.
