It seems that someone has posted a new pv from TokoMX.
Eventhough this PV is hardly different from the first one, atleast we get to hear a little of the ending song and Pannya
Edit: I doubt we are going to see Yutsuki in the anime, because she is a new character that was created for the psp version.
For that same reason i also don't think that we will get to see an story arc focused on Sana :/
edit i am not sure now if itīs a part of the ending song, it could be a part of the opening
very late edit: the youtube account that posted this video was terminated
more late edits: found the same video on nico
http://www.nicovideo.jp/watch/1316681848