Yuri no Hana Ren'ai Jijou ~Tousaku Shita Pure Love Story~

Mizuha is a popular student in a girls school, but she wants some change in monotonous life. One day she argues with her fan Nina, and that leads to kissing and then romantic relations. Then one day teacher nicknamed as "Queen" approaches the girls and introduces them into the world of humiliation.

[From vndbreview]