This is one of the most depressing anime I've watched, but in a good way. At its core, it's about bullying. What makes the movie interesting is that it portrays the lives of several people and shows how they deal with their problems and overcome obstacles. At the end, I felt like I understood why some characters acted the way they did. Some scenes made me really angry and I had to calm myself down since sometimes, despite being a work of fiction, it didn't feel fictional at all. However, there are also a lot of heartwarming moments, like those in which the main charactergains self-confidence and speaks out for herself or where other people show genuine acts of kindness.

What I didn't like was that there were several instances where characters almost instantly changed their behavior. It felt a bit unrealistic and sometimes cheesy. Part of the movie also dealt with disabled people, but that honestly felt more like an unimportant side-plot because the overall time you see the main character interact with the disabled children was very short and not very significant. Therefore, the movie would have benefited either from being longer or from leaving out some of the side-characters/plots.

I would not recommend this movie to those who dislike sudden character transformations and I definitely wouldn't recommend it if you are easily triggered by bullying scenes.
I would however recommend it to those who want to watch a bittersweet character-driven drama where you might shed a tear or two.