How about the Tsukinami brothers learning that their maid is a werewolf when she transforms in front of them during a full moon?

(･ω･`〃) 

Carla:

-He can hardly stand the idea of having such a lesser creature around his home, but servant is a very good place for something like you. Any kindness he may have had towards you vanishes, and he treats you with nothing but cold propriety from that point on. 

Shin:

-While he does detests having such a weak race around, werewolves are the ones he can stand the most. He’ll never quit bringing it up, though, and misses no chance to call you a “real bitch” and take cracks at your heritage being that much lesser than his own.