Combining action and comedy with the supernatural genre, The Testament of Sister New Devil is a high octane romp about a high school boy and his two succubi step-sisters.
When his oddball father suddenly decides to remarry, high school student Toujo Basara is about to acquire some very peculiar new family members. Enter his new seductive step-sisters, Mio and Maria. When Basara discovers that one of his step-sisters is a succubus, and his other a recently crowned demon lord, all hell breaks loose!
Basara is almost forced into a contract with his demonic sisters where he would act as their eternal servant-but something goes wrong. Instead, a reverse contract is formed, and Basara becomes the master. Between fending off their seductive advances to coping with the attacks of rival demon contractors, Basara has a big learning curve if he is to survive.
About the Author
Tetsuto Uesu is best known as the author of The Testament of Sister New Devil light novel series.
Miyakokasiwa is best known as the artist of The Testament of Sister New Devil manga adaptation.