It's a very hard-hitting piece of work. You'll find yourself balling your eyes out multiple times throughout. Rarely do we find Mangas and Animes that talk about mental health issues, and this is one such anime. I am not going to be diving deep and spoiling things for you all but know that this anime could be triggering for you as it addresses topics like Guilt and Suicide.
This anime is a testimony to the fact that you don't need season after season to make an anime that'll forever be in the hearts of viewers. As someone who's currently watched over 300 animes, Orange stays at the top 10 in my list because of its sheer rawness and courage to address a topic that's way too much ignored.