-SPOILER! Please watch Boyfriends from Webtoon first if you don't wanna get spoiler-ed. This is from episode 126 season 2-

(You're Prep)

Nerd had passed his exam and now going to Goth and Prep's apartment. He went inside, greeted Goth before literally making out on the couch as a reward by Goth because he helped Nerd study. Before things would get dirty, Prep walked pass by before suddenly running to the bathroom. As soon as Prep is in it, Goth and Nerd heard something- HRRKGH, Prep puked.

Nerd: "D-did you hear that...?"

Goth: "Yeah...i think it's Prep, is he okay...?"

Nerd: "We better check it out..."