Haesol has had a crush on Joohyuk for a long time, since childhood really, but Joohyuk only recently realized his feelings for Haesol. Haesol has been trying to push his feelings down, but Joohyuk tends to be very flirty to Haesol unconsciously, then the Otaku friend steps in at the amusement park and tells Joohyuk that he shouldn't treat Haesol like he does everyone else (aka that he should be aware of his actions making Haesol uncomfortable. I don't actually know if I summarized that last part right, but I hope it works).
No that's perfect, thank you! It's all coming back, especially the amusement park part!
I can't remember how/when the second couple were introduced as a thing... Can someone summarise their relationship or tell me which chapter to go back to?