"Sister Princess" is a unit comprised of 12 voice artists who star in the anime show of the same title. The unit has spawned another new unit called 'Prits'! Its members are Natsuko Kuwaya, Hisayo Mochizuki, Yumiko Kobayashi, and Nana Mizuki. This maxi single contains 3 newly recorded vocal songs, and 3 'OFF VOCAL' versions. (Contains 6 tracks in all.)