Beautiful.
Just amazing how the rythem and the lyrics were organized. The words, perfect. It sounds peaceful, clean and well on set. However, I disliked that the two voices were really off. Once is low (that's good) but the other one had times with too much high pitches. Doesn't sound absolutely perfect to me. But overall, it's really good.
I suggest you to revise the pitches and maybe make it match a little bit (not to let them be way far from the master pitch).