I'm not particularly a manga or Japanese movie/tv fan and I didn't know the cartoon and movie existed. I might have to check them out.
From the perspective of someone who is watching this without any expectations and randomly found this on Netflix:
This show is absolutely amazing. Just bingewatched the first 6 episodes. The acting is brilliant, the characters are so amazing, and I'll admit I almost shed a tear in several episodes out of sheer glee. This reminds me of how I enjoyed the film Amelie; a pleasure to see all the unique nuances, especially after watching one of the most terrible films I have ever seen in my life a few days ago called Stasis.
I hope the rest of the season is as good but I could probably die happy after only 6 episodes. Thank you sincerely to those who made this with such endearing people. I want to hug you and them.
By the way, the show Haters Back Off needs more 1 star reviews. Please take the time to downvote terrible shows so I can experience more of this and less of that.