I know a lot of people here feel sad for Sunyool because his heart was throbbing, but to me this is a sign that Sunyool is just getting started to get serious with Jisuh, Hence he said: "I should steal Jisuh away for myself", I think this is the start of something new and how determined he is and a part of me kind of hopes that Sunyool would succeed in stealing Jisuh's heart because up till now all he's been doing is teasing him and being a cute annoying brat to him haha! I think this is where the character développement of our three protagonists is gonna start and I can't wait for more!!!!
Heejae is gonna be more desperate for Jisuh (especially since Jishuh claims that this is the LAST TIME) so he needs to learn that manipulation and being a dick is not the way to get to him.
Sunyool: is gonna try to woo Jisuh seriously and confess that he likes him and have more moments with him so their love could be matual.
And who knows, maybe we'll end up having a 3 way healthy relationship with 3 attractive cuties ლ(´ڡ`ლ)(づ ̄ ³ ̄)づ
"I want to be those gym clothes" .. Well, Don't we all..