Spoilers
He attempted to assault him, thinking he was planning to have sex with Hyunwoo when a condom fell from his pocket, but he soon came to his senses when Il-tak started to cry and explained that wasn't the case. He felt so bad that he played it off as a joke and then they both started laughing, that's when Hyunwoo entered while they were still in a compromising position.
I'm going based on how the scenes looked from the Raws I still don't understand a lick of what they're saying. https://toonkor433.com/%EB%82%A8%EA%B3%A0_%EC%86%8C%EB%85%84_36%ED%99%94.html
I like hyunjoo(yes the orange haired boy) and iltak. Despite the touching , I think the way he likes iltak is super cute