Hi Japanese speakers, I’m curious about the pronunciation and inflection of this song

I recently found this beautiful Lily Chou-Chou song (アラベスク). I think the singing is really sweet but I'm wondering how it sounds to native Japanese speakers. I can generally read (but not understand) hiragana and when I read the lyrics along with the song it sounds like it's being pronounced completely differently. の sounds like ぬ to me for example. I see other characters but never seem to hear them sung. Is she singing in a different dialect or inflection? I listen to other Japanese songs and can tell pretty easily it's in Japanese but when I hear this it almost sounds like Icelandic to me.

Thank you in advance for any information!