What a coincidence, I also watched the anime recently and there are scenes that really hit you too hard. Like the one where Kaori technically gives up and wants to drag Arima to suicide
Or there is another one where you think everything is going to be fine and then you get a hard reality check, the disease is too strong and too serious.
I really loved the anime and the ending is as you say, happy but melancholic.
hay escenas algo divertidas, escenas sentimentales de superación y éxito asi como momentos realmente crudos y fuertes, ese punto donde ella ya estaba por vencida y hasta mencionaba la muerte de forma satirica pero realista fue muy duro.
el final increiblemente bello y triste, como de alguna manera logran despedirse al quedar absortos en su musica fue genial y demonios cuando lee la carta que le dejo, que triste :/
There are some funny scenes, sentimental scenes of overcoming and success as well as really raw and strong moments, that point where she was already defeated and even mentioned death in a satirical but realistic way was very hard.
the ending incredibly beautiful and sad, how they somehow manage to say goodbye by being absorbed in her music was great and damn when she reads the letter she left him, how sad :/