idk why everyone's so upset about the mc's behavior. no one's really at fault in this situation. mc isn't heartless he just seems emotionally numb and detached and has his own problems, but it's obvious he still cared in his own way seeing as how he kept in touch all those years, and taeshin wasn't a stalker he was just a clueless and lonely person. stories would be pretty short and boring if characters were all completely emotionally well adjusted and made the correct mature wise decision 100% of the time. don't wanna pick fights with anyone but this isn't r/amitheasshole they're fictional characters they're allowed to be assholes that's what makes it interesting.
even the first five pages are unbelievable