Absolutely wonderful progression--throughout, but especially in the instrumental bridge near the end. I really hope you will continue to search for a singer. At present, the melody is a little blocky and could be benefited by a human voice and some small glissando's. Having said that, though, what follows might make the more inhuman vocal more fitting than not.
This began with a real epic romantic feel. I thought I was in for a rapturous love song. Clearly that is not how it turns out as both musically and lyrically it just gets darker and darker. I HOPE what you were aiming for is "creepy", because that's where I think you arrived.
You both established and shattered the epic romance convention and wrote a piece that, to my ears, works more perfectly as the ending music for the credits of a Stephen King adaption or (help me) a Michael Haneke film. Dear God, I hope that's "good news" to you, because from my chair it's freaking brilliant.
Don't stop on this one. You might need a little help from a native English speaker/writer to polish a little, but that's hardly necessary. Whatever you do, don't ruin what you have.
Yours, in fear and trembling,
T
Thanks Tangmo for your insightful and rewarding comment

I fully agree, the melody is bit blocky, it is not easy to make nicely flowing melody with Vocaloid, so I left that freedom for the real vocalist.
Thanks for mentioning Michael Haneke, his early movies were really creepy. I wasn't after so creepy, the ending is more like a warning to think about consequences of chasing after dreams. Maybe the dark part is people naively dragging others to the same horrible fate. Difficult to explain, but I'm happy with the ending and glad that you liked it also

Janne