Hana to Shinobi

Hana to Shinobi summary:

Kasugami Benio is the sheltered daughter of the richest family in Japan. According to her family tradition, the first man she kisses will be the one she marries. Now that she’s old enough to gain some freedom, Kageshita Tamaki, a handsome playboy is assigned to be her bodyguard… Master x Servant love story starts here!