The song fits hachi so much, because hachi suffers from color blindness cause his a cat after all, hachi really didn't enjoy the world around him because he can't see the beautiful nature surrounded to him. Until he met aoi which eventually take a huge change of his life.
This song reminds me of Evangelion 3.0 in the final part, it makes me nostalgic but the song and the vision of Adora's future with Glimmer Bow and Catra is beautiful.
That's a very interesting thing to hear, guess I'll have to be on the lookout for similar vibes when I eventually get around to watching evangelion myself 😁