Gakeppuchi Reijou Airisu no Sho Jijou ~Nariyuki de Maou Hakushaku-ka no Kateikyoushi ni Narimashita~

Iris, the daughter of an impoverished baron, was facing a political marriage that amounted to little more than being sold off. While spending her final social season as a single woman, she receives a request from her cousin—? Three lonely souls meet at the Demon Lord Count's estate and gradually become a family. A heartwarming "found family" romance begins!