This is a single from from  the lovely Satou Rina who has voiced many characters such as Negi from Negima, Minami Haruka from Minami-ke, and Mikoto from to aru index. As for this single I guess it's from one of her radio shows, also included is the bonus dvd which has the PV to the song on this single, Masshiro na Kimochi, and Sora iro no ribbon.

Sora iro no ribbon:

http://www.youtube.com/watch?v=KLcOFrj1u9M" href="http://www.youtube.com/watch?v=KLcOFrj1u9M" class="linkification-ext">http://www.youtube.com/watch?v=KLcOFrj1u9M

Masshiro na Kimochi:

http://www.youtube.com/watch?v=mOlHGE-dN0U" href="http://www.youtube.com/watch?v=mOlHGE-dN0U" class="linkification-ext">http://www.youtube.com/watch?v=mOlHGE-dN0U

more info:
http://www.yesasia.com/us/1004087500-0-0-0-en/info.html" href="http://www.yesasia.com/us/1004087500-0-0-0-en/info.html" class="linkification-ext">http://www.yesasia.com/us/1004087500-0-0-0-en/info.html

direct download:
http://rapidshare.com/files/245570070/Satou_Rina_-_Masshiro_na_Kimochi.zip" href="http://rapidshare.com/files/245570070/Satou_Rina_-_Masshiro_na_Kimochi.zip" class="linkification-ext">http://rapidshare.com/files/245570070/Satou_Rina_-_Masshiro_na_Kimochi.zip

can't connect to the tracker still so use

http://www.nyaatorrents.org/?page=torrentinfo&tid=70391