I cannot for the life of me remember this song I heard from either an anime or a game. It has lyrics in it, it's Japanese, it had a female vocalist, and the part stuck in my head, if I remember correctly, was either the bridge or the outtro.

I have replicated it on virtual piano.
http://virtualpiano.net/

fds asasdf aa
sap asas ddsf
gfd gf dsd s
gfd dd fgf
H (then loop from the beginning)

I think the "sap" part was a "Yume wo", but I can't be sure. Anyone got even the slightest idea what this could be?