I will start off by saying I genuinely don’t mind the sad ending here. I did cry a little bit and honestly love me a good tragedy every now and again. My issue with heartbeat is with how the sad story was executed. Things got quite muddled and draggy towards the end, and it genuinely felt like midway through the series the writer was like, “lol what if instead of sticking to what we told the viewers in the first half of the show we made it seem like the cat dude just conveniently forgot to say that SWH needed to kill someone to turn into a human? Like woopsies I guess he just ‘forgot’ that killing someone is kind of a big deal and didn’t think it was that important.” Like cmon be so fr who would actually ever miss such a big detail. The logic is just so weird and the side characters quite frankly were so boring, I genuinely never got into any of their personalities and they just felt so misplaced in this show if that makes any sense. Anywho, I did really really love this drama in the first half and thought it was hilarious and super cute and aesthetic, but damn the writing was such a letdown for literally no reason.

TBH though, I don't think it deserves a 7.4 rating. I think the reason it's that low is because of people who gave it significantly lower ratings just to bring down the overall rating and that's kind of sad. It genuinely wasn't as bad as it's made out to be. The writers just got a lil confused in the second half.