Haechan is very loud. Mark doesn’t like loud kids. They are annoying.  That’s what 10 year old Mark thought. Or  A story where Haechan died and Mark really wants to turn back time just to make things right.  

Just a story which includes Mark coming home to the dorm still a little tipsy from the show where he drank with the other guests, then he sees Haechan sitting on the couch in front of the tv.

A story of what happened after that unnecessary drama, where Mark and Haechan get bolder as time goes by, as they didn’t talk about ‘it’ to the others yet, but they just show it to them, or more like, giving them hints.