Bikyaku Agent Leafa "Kuyashii! Konna Hikyou na Yatsu ni Makeru nante..."

There is a small town where a martial arts competition, hosted by a criminal group called the Ouroboros, is held once a year. Leafa, an ace agent of the International Drug Elimination Organization, secretly takes part in it to arrest Efreet, the boss of the group. However, Efreet takes her hostage and sexually assaults her! What will happen to her...? What is the Ouroboros...?