Here's the link to a song I wrote that might also fit with the story if you want to use it https://youtu.be/0yDxxdnI1qw

Your voice is amazing, your high range classical style is what I was thinking for the music of this webtoon dub, maybe even at one point throw in the third one with the low pitch, I love it. I will defiantly keep your audition in my mind and will definitely consider this as the background music.