"Mondaiji Tachi ga Isekai Kara Kuru Soudesu yo?" is a manga adaptation of a light novel series that blends fantasy, action, and adventure. The narrative centers on three extraordinary teenagers—Izayoi Sakamaki, Asuka Kudou, and You Kasukabe—who are transported to a mysterious world known as Little Garden. This realm is governed by a unique system where conflicts are resolved through high-stakes games, and participants wield supernatural abilities granted by their "Gifts."

Izayoi Sakamaki is a confident and overpowered individual with immense physical strength and intellect. Asuka Kudou possesses the ability to communicate with animals and manipulate their behavior, while You Kasukabe has the power to control temperature and create ice. Upon their arrival, the trio is recruited by the struggling No Names community, a group of humans and demi-humans who have lost their name, status, and territory due to repeated defeats in the games. The No Names are led by Black Rabbit, a cheerful and determined executive officer of the community.

The story progresses as the three protagonists use their extraordinary abilities to help the No Names regain their standing in Little Garden. They participate in various challenges and battles against other factions, uncovering the intricate rules and politics of the world. Along the way, they encounter powerful entities, including deities, mythical creatures, and other Gift users, each with their own agendas and abilities. The narrative explores themes of camaraderie, strategy, and the pursuit of justice as the protagonists navigate the complexities of Little Garden.

The manga maintains a balance between intense action sequences and moments of character development, highlighting the dynamics between the protagonists and their allies. The world-building is expansive, with detailed lore about the origins of Little Garden, the nature of Gifts, and the hierarchical structure of its inhabitants. The series also delves into the backstories of key characters, providing depth to their motivations and relationships. Overall, "Mondaiji Tachi ga Isekai Kara Kuru Soudesu yo?" offers a compelling blend of fantasy and adventure, driven by its unique premise and engaging characters.