Serie includes 256 albums .
Ruiseki Kairaku Jouhougun
Ruiseki Kairaku Joujougun
Ryoujokuteki SOS!
SOS Call
SOS-Dan ni Youkoso!
SOS-dan Tai NNZ-dan
SOS-dan no Kyuujitsu
SOS-dan o Yacchimae!
Secret Eyes
Shokushu desho desho?
Skip Skip Reverse
Smilin Days, Sunny Holiday