Queen's Iron [Male Gunslinger OC X Queen's Blade]

In the middle of the desert, a gunfighting cowboy find himself transported to another world, and it was caused by a strange, unknown artifact that's buried in the ground, which activates the dimension slip effect around the area if anyone is close to it. He is now stuck in a fantasy world, when warrior maidens were battling each other for the tournament in order to become the next queen of the land. While the tournament is going, rumors arise about a dark forces threatening to destroy all of the land. With the newcomer of this world, it's up to a gunfighter to seek adventures and fight back against the dark forces, while also meeting warrior maidens.