Summer ghost review

There's a beautiful anime named "Summer ghost". I have watched various ones, but this is one of my most favourites. The concept, the animation, the comprehension of all of it is just so amazing. Absolutely the best! A must watch.
I'll write here about what I took from this precious story as I'd like people to give it a chance too :)

Please beware of the trigger warnings though:
Suicide, Bullying, Terminal disease