Ring (V2)

[Richard]

Hey Youi,
I get what you're going for here. My biggest suggestion would be to be careful when writing about love because it's been done so much in poetry. I'll go into more detail below:

You've concealed 
my heart inside a music box -I know you're talking about love and similar feelings here. However, it made me think of a bloody music box because it borders on cliche to talk about one's heart when talking about relationships/love. I wonder if the heart is actually a ring, giving the title a second meaning? If it is, may be make that clearer to the reader.
you'll only open 
once I've chimed a final vox. -To me "vox" is a strange word choice that seems only there to make the rhyme complete. I'm certain that there are others who would disagree. 

In there, you'll find it's changed  
and left behind a note: -How does a heart leave a note? Again, I get what you're going for here. I would suggest rewording it though.
"I'll never sing for you again, 
or play a single note." -How does a heart play music? I get the singing, metaphorically speaking.

I feel like you got some good feelings here that you should explore. I would suggest expanding this poem more, so it doesn't rely on the heart as a vital image so much. 

Cheers,
Richard