Dude needs to defeat a monster in order to save the world. However, he isn't strong enough and needs a power-up - which just so happens to involve his blonde teammate. Episode 2 involves a guy training his little sister on the art of cock-handling. His cock in particular.
Her name is Erin. Together with the sword spirit Nighthawk, he is traveling the world to regain the magical power that was stolen. Erin and Hawk came to the Western-style building in the forest. Erin squeezes the spirits from the men in the maids' orgy.