I cannot quite understand how Kim Dan admitted to himself of having good memories when he almost lose himself in the process. For Joo Jaekyung to only realize the importance of the person very late, I still don't think that is redeemable. For him put through Kim Dan to such lengths, I can never.
Just my two cents.










Imo, it really is not a romantic feeling from the ML. He only wanted to feel the satisfaction of having the MC by his side, not love but obsession. There wasn't anything romantic at all.