I'm relieved the author didn't drag out Hajin's realization with 50 chapters of backstory.
Hajin literally did the mistake "unlabelled" partners are stereotypically known for: partners who wanna stay "unlabelled" somehow end up cheating cuz they either hate commitment or do not sincerely like their partner lol
I also have to remind myself Hajin lacking awareness as a fully grown adult makes sense since he is still a MAN after all lmao