Testament of Sister New Devil
Автор
Tetsuo Uesu
When his father decides to remarry, Toujo Basara is about to acquire some new family members. Step-sisters, Mio and Maria. Basara discovers that one of his step-sisters is a succubus, and his other crowned demon lord, Basara is forced into a contract with his demonic sisters where he would act as their eternal servant-but something goes wrong.