Himitsu no Mofumofu Konintan

A love story between a foreign diplomat hiding a secret and a downtrodden, dog-loving girl, featuring a surprisingly fluffy transformation! A girl with a complex about her height, Nono was treated cruelly by her stepmother and stepsisters. One night, she meets a beautiful wolf. Nono wishes she could be reunited with that beautiful animal who brought her comfort, but she is summoned to the grand mansion of a British diplomat instead...?

(Source: Petit Princess, translated)