Follow the lead of the headmaster and watch over the naughty schoolgirls in the sorority. Make sure that they behave properly all day... If under the term of ‘good girl behavior’ in your dictionary is... 1. to have some lesbian fun in the dormitory, or 2. to practice double penetration at the private vocal training, or 3. to collect some gangbang experience at the morning assembly... well, you will definitely do your job perfectly well.