Kyonyuu Onna Senshi Dogeza Saimin

Based on the erotic game by Lune.

In an isolated island in the middle of the ocean. There is an arena where warriors from all over the world gather to compete. In the arena, fighters were ranked and determined by their abilities. Rumors of their skills spread far and wide, and now hundreds of warriors from many countries have came to rate their warriors among the best. At the top, the name of a young female warrior is held up at the pinnacle. With her skills in swordsmanship and good looks, she will be promised riches and fortune for years to come.

And at the very bottom: There stood a man glaring at her with a dark gaze.