Siwoo takes peeks at Naeun filming racy content for her secret account in an empty lecture room, he later raids the room and protects her from getting caught. When the strangers leave, he makes a bet with her, and if she loses, Naeun becomes his slave for life.
Siwoo, Yujeong & Yoon Jian enter the dungeon together. In order to clear the dungeon quest, Siwoo needs to give up a certain amount of energy (orgasm) and is made to pick between two rooms to choose a partner. MC ends up with Yoon Jian, and she doesn't hesitate to help with the mission. Yujeong starts masturbating to the view of the two fucking because there's a crystal ball in her room which lets her see what's happening in Jian's room.
Yu Se-Ha corners Kim Bong-Su in the stairwell and asks him why her body heats up every time she thinks of when they had sex in the locker room. Bong-Su says he will help Se-Ha become better if she masturbates, so Se-Ha pulls down her pants and starts fingering herself to improve her volleyball performance (Chp. 5)
Yu Se-Ha makes herself cum fingering herself. Bong-Su reflects that he can change players stats as Se-Ha asks him to changed her stats, but he didn’t realize she would get so horny. He starts fingering her himself as she cums almost immediately. Yu Se-Ha thinks Bong-Su replaced her body with one that’s just horny and Bong-Su bluffs he will change it back if she makes him cum in 17 minutes. Chapter ends with her riding him in reverse cowgirl (Chp. 6)
Yu Se-Ha gets fucked hard in reverse cowgirl before going to one leg-straddle then doggystyle. Bong-Su tells her to keep her moans in as he puts her finger in her mouth. Se-Ha’s tells him she’s had enough but her body doesn’t feel the same. Bong-Su says no one is on the third floor and has Se-Ha crawl up the steps while still getting fucked in doggystyle. She drips on the stairwell as the chapter ends (Chp. 7)
As Se-Ha gets close to the top of the stairwell, she hears voices. She tells Bong-Su this and he said did I say you could stop as he starts pulling her ponytail while fucking her. Se-Ha starts to reach her limit as someone hears them. Bong-Su covers Se-Ha’s mouth as he responds and they don’t get caught. Se-Ha’s mind starts to go blank getting fucked in missionary as she squirts on Bong-Su’s shirt. Scene ends with Bong-Su giving Se-Ha a creampie in missionary. (Chp. 8)