Elf to Hitotsu Yane no Shita

Uesugi Kage is a high school student in her second year who has been unable to find a new love because of her past love at first sight. When the apartment in which she lives is to be demolished, she comes face with her landlord, Hojo. A life of cohabitation between an elf and a high school girl with a 1,000 year age difference begins.