Why isn't this webtoon famous?

Maybe it's because the thumbnail looks uninteresting and the title isn't very catchy,
but I happened to watch the first episode and ended up binge-watching all 210 episodes at once.
Luckily, it was a series that just finished today.
It has good continuity, the characters are charming, and it doesn't feel too childish,
so I highly recommend binge-watching it while it's still free.