Choukyou Katei Kyoushi ~Ojou-sama wa Niku Dorei~

The lead character, Yanagi is a private teacher of a rich girl.
Her highhanded behavior irritates him constantly.
One day he happens to learn a secret about her and her family.
Using that information, he starts to train the girl, and take over her family.
Can you succeed in taking control over this rebellious girl?

[From DLSite English]