A group consists of 5 school-girls: Aiko, Rei, Koyuki, Toshiko and Murasaki. Aiko is the cutest and easily frightened one. Rei is the clingiest of the group as well as being Koyuki’s little sister. Koyuki is the most collective of the group. Toshiko is the smartest of the group. Murasaki is the strongest and bravest of the group! As they are the only one who are in this school, the power suddenly went off! Their mission is to pass the time by adventuring and play with each-other!