Firstly, the plot is interesting yet not too theoretical - personally, I feel that this is very crucial considering that a lot of an anime's intended meaning can be loss in translation and turn out gibberish. The episodes are also coherent and I like how each episode isn't ended on an abrupt note while keeping you hooked. The pace in which the plot unfolds is brilliant.
Secondly, the characters are well-drawn (could be a personal preference) and there's ample humour that's injected into the series. Kudos to the producers for keeping the anime light-hearted yet at times being able to induce feelings of empathy/sadness for the characters.
Thirdly, the characters are well-developed: you're given enough background that's needed to appreciate the flow of the anime. Again, this is an important aspect as some animes tend to go overboard and spend too much time in developing certain characters even though it doesn't value add to the anime.
tl;dr this anime defo deserves a watch and a 2nd season!
