Eh, it's a'ight. I feel as though she has reached the limits of her voice with this song. I'll probably end up liking it anyway.
Sounds like the title is "月夜の少女" or "Tsukiyo no Shoujo (Moonlit Night's Maiden)". Though take that with a grain of salt. I'm only basing it on what I heard since I was unable to find confirmation either way, in English or Japanese.
Did someone say Moonlight Knight?
Look at me, droppin' Sailor Moon references like a champ.