Gangchan wants to learn some workout exercises from Seyoung but that takes a weird direction. She then pounces on him while he was still asleep. Gangchan wakes up to Seyoung being on top of him, and then SHE FUCKS THE SHIT OUTTA HIM.
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.
