"Kyonyū Fantasy" is an anime series that blends elements of fantasy, comedy, and ecchi genres. The narrative centers around a young man named Raul Cauter, a former knight who is summoned to a parallel world to fulfill a prophecy. This world is populated by various races, including humans, elves, and demons, all coexisting in a medieval-style setting. The prophecy foretells that Raul will save the world from an impending catastrophe, but his arrival is met with skepticism and confusion due to his unremarkable appearance and lack of extraordinary abilities.

Raul is accompanied by a group of female companions, each with distinct personalities and roles. Lilia, a skilled swordswoman, serves as his primary protector and guide. She is fiercely loyal and often takes charge in dangerous situations. Another key character is Airi, a mage with a mischievous streak and a penchant for teasing Raul. Her magical abilities are crucial in navigating the challenges they face. The group also includes a priestess named Elina, whose healing powers and calm demeanor provide balance to the team.

The plot unfolds as Raul and his companions embark on a journey to gather the necessary artifacts and allies to prevent the world's destruction. Along the way, they encounter various adversaries, including rival factions and powerful monsters. The series incorporates humor through Raul's interactions with his companions and the absurd situations they find themselves in, often stemming from the ecchi elements that highlight the characters' physical attributes.

As the story progresses, Raul's role as the prophesied hero is called into question, and the group must confront their own doubts and insecurities. The narrative explores themes of destiny, camaraderie, and self-discovery, with Raul gradually growing into his role as a leader. The series balances its comedic and ecchi elements with moments of tension and character development, creating a dynamic and engaging storyline.