I think they were just a couple of dumb kids who didn't know how to talk or express their emotions. One thing…
I thought in the past may be they shared a kiss omggg after the 7th episode I was like what the actual f. Why are they handling this in that way, achi cut off all ties with him after asking ji if he wants to try, and all of a sudden after ten years achi came in finding ji and asked for help like where did he get that enlightenment??? Not to mention he was always in a relationship with a girl the past ten years and he was in a steady relationship with Mona while finding ji and meeting him. What the hell. Didnt even make a bit of sense to me.