Kisara

Kisara is a powerful demon who has entered into a pact with Ogata Osamu, spending her days disguised as an ordinary high school student. She draws upon Osamu's memories through kissing as the price for wielding formidable combat strength, while also taking full charge of his everyday needs and chores. Harboring open hostility toward any woman who approaches Osamu, she is a young woman whose devotion runs devastatingly deep—both on the battlefield and in matters of the heart—defined by her yandere disposition and fierce possessiveness.