well, it's been years that I gave a comment on recommendation of animation. most of my time on English is about -core music recommendation.
about jazz, I know some theoretical matters and some definitions about some branches, and I'm pretty into free jazz with no-wave elements and improvisation, especially about drum playing then.
and that adjective word, yeah, "devil-may-care", my first time saw the word, only reminds me of the video game "Devil May Cry" lol. mmm, I could imagine the character you express with this technical word, good job.
then, tiny grammatical errors, "The light glittering on their faces, I could never left it behind my mind. " ya, maybe you know how to fix it right? what about "The light glittered on their faces, and I could never leave it behind my mind."?
"and that was the song called "Moanin'" appearing in Episode 1" → "and that was the song called "Moanin'" appeared in Episode 1".
"It is more civilian than the classicals," → "It is more plebeian than the classicals." the word "civilian" doesn't mean "the thing that is close to people" as far as I know, so I choose another word which contains the meaning you wanna express.
"When talks about childhood sweetheart" → "When talking about childhood sweetheart"
"Then her thought of the things as her favorite" → "Then her thoughts of the things as her favorite"
"a miracle or a strong magnet between them as two unconstrained souls." → "a miracle or a strong magnet between them is like two unconstrained souls."
that's it, hope it could help you. and I know you're gonna take IELTS, so give you a IELTS-like score system.
7/10
not so many advanced words, a little errors, but you really have potentials for writing. keep it up~@@32!!