Ijiwaru Shinai de Dakishimete yo 「KYAST Dance Shot Ver.」 Meaning

According from Hello! Station #43
http://www.youtube.com/watch?v=vdFaMJvdMf4

「KYAST Dance Shot Ver.」 have mean

K → Karin

Y → Yuka
A → Akari
S → Sayuki
T → Tomoko

WE ARE JUICE=JUICE