プリンセスムーン　～聖宝石騎士団の受難～

In 1311 hero Olivia and her "St Jewel Knights" friends overthrew the corrupt dynasty and founded a revolutionary government. The other mainland kings tremble in fear at the prospect of revolution shifting to their countries. The knights squadron has one weakness - they are all women. Kings hire a legendary trainer to awaken sexual desire in the commanders of this military unit.

[From vndbreview]