Responses
Don't forget that although Hajun had been harbouring feelings for Yoonjae (blondie) in the past, he's also recently realised that those feelings are now gone. I think this is ref. to ch. 44 ( when he's hugging yoonjae in front of his house). I can't say that he's fully aware of his feelings for Candy, but I think he knows that who he wants to be with now, is him. Not blondie. Sadly, the jealousy and confusion is the best opportunity for Candy to let go and slip away. In this sense, I do agree that a break-up was defo inevitable.
Doesn't mean I wanna see my babie Candy sad tho ┗( T﹏T )┛---> (╯°Д °)╯╧╧
Why are some of y'all confused like?? Candy is an agent who is on a mission, he knows that he had caught feelings for hajun and therefore knows that it could jeopardize the mission, also doesn't help that Hajun clearly has somethin going on with the blond (romantic or not, it's pretty shady). There are so many reasons to break up and I honestly wasn't that surprised that he ended it. It's obviously gonna be resolved at some point but right now it makes complete sense for him to end it (〜￣△￣)〜 (but ouch, over the phone? that's cold)