Initially, I picked this show because of Yamapi. It turned out to be good, so much better than I anticipated.

It is an adaptation of a manga with the same title, but if you read the manga you'd probably be disappointed because the characters and story in the show are quite different from the manga.
In terms of the story, there are some manga-like tropes that are unescapable here. I mean, if you've read a lot of manga or watched a lot of anime, you could probably guess the outcome of each tests in the story. Still, it is quite an entertaining and heart-warming story overall.

Acting and cast are excellent. I think the multi-language and accents are quite additional charms to this series.

I don't think there is any notable OST that clings to my mind, and while it was enjoyable, one-time watching is quite enough for me----nothing quite appealing for a rewatch.