Mimitsuki no Kuro

Fifteen-year-old Agata Kurumi is starting high school. She tries to help everyone around her. When she rescues a stray dog during a rainy day and gives him a bath, he suddenly turns into a boy! Kuroki is a werewolf looking for a partner to “love” so he can control his powers. Attracted to Kurumi’s caring personality, he saves her from a pervert, and now she has accepted to take care of him. However, in the residence where Kurumi lives, pets are not allowed and boys are prohibited. What are they going to do?

(Source: Otakuteca, translated)