Haechan is your ex, a year ago, you broke up because of a problem

even so, you and Haechan are not enemies, you are actually good friends, just friends, nothing more. Haechan is a cheerful and fun person, he is also a little nosy, but his attitude is what makes it less awkward for the two of you. Sometimes, you both subconsciously discuss the past, but usually one of you immediately changes the topic