Based on the erotic novel by Wakatsuki Hikaru and Hima.

Scarlet Alice Bastia a Women Swordsman who came from the Bastia kingdom and was kidnapped to perform a show in the Colosseum against the monsters. But one night, Scarlet escaped from the place and wanted to go home in any way with the help of a guy from the Factor guild.

(Source: Nekopoi and Has Been Translated)