9 warrior maidens fight against the demons that threaten humanity. Their driving force is the "love" with a high school student. Takuma Akutsu is a lonely high school student who is not good at getting along with others and is nicknamed "devil" because of his terrifying appearance. After helping a girl, he was asked to become a lover with the 9 warrior maidens who fight demons and protect humanity. The method is... "love and intimacy" with the warrior maidens! ! Takuma, who has made a lover's contract with the 9 sisters, began to live under the same roof with them, challenged various intimate tasks, and led them to fight... Let's prove that love can save the world! Warrior maidens, start--