Great anime, based off a great and heartwarming webtoon. My only gripe is that the animation budget seems more shoestring than it deserves to be. Has some "Shaun of the Dead" and "iZombie" vibes if anybody on this site watches anything other than anime.
One caveat is it's only in Korean with no available subtitles, but its nearly beat-for-beat the webtoon, so if you read that you'll get the gist of the dialogue. It can be found on Netflix Korea and AniKids EBS...and nowhere else. Props to the studio for making an anime that's unironically impossible to pirate due to region lock and lack of interest. I'm just glad this at least exists since I'm a fan of the original webcomic.