Thanks to his father's sudden remarriage, Tojo Basara finds himself with two beautiful new step-sisters. Their names are Naruse Mio and Maria. Mio wakes him up in the morning, while Maria stands in the kitchen wearing a suggestive outfit...
A middle school girl who 
doesn't know anything
Einer Mittelschülerin,
die von nichts wusste,
Una chica de secundaria común
Una chica de secundaria común
Una studentessa delle medie
 all'oscuro di tutto
Uma garota do ginásio que não sabe de nada
На ничего не подозревающую школьницу 
сваливается судьба дочери Повелителя демонов.