"Problem Children Are Coming from Another World, Aren't They?" centers on three teenagers with extraordinary abilities who are transported to a fantastical realm known as Little Garden. The world operates on a system of Gift Games, where individuals and communities compete in challenges to gain prestige, power, and resources. The story begins with Izayoi Sakamaki, a boy with superhuman strength and intellect; Asuka Kudou, a girl who can communicate with animals; and You Kasukabe, a young man with the ability to manipulate temperature. Each of them feels disillusioned with their mundane lives on Earth and receives a mysterious invitation to Little Garden, which they accept.

Upon arrival, they are welcomed by Black Rabbit, a representative of the No Names, a community that has fallen into disrepair after losing its name, flag, and honor in Gift Games. The No Names are led by Jin Russell, a young boy who seeks to restore the community's former glory. Izayoi, Asuka, and You quickly demonstrate their exceptional abilities by defeating powerful opponents in Gift Games, earning the respect and admiration of the No Names. Their victories begin to turn the tide for the struggling community.

As the story progresses, the trio becomes embroiled in the politics and conflicts of Little Garden. They encounter various factions, including the Demon Lords, powerful beings who rule over different regions and challenge the protagonists in high-stakes Gift Games. The narrative explores themes of camaraderie, ambition, and the pursuit of purpose as the characters navigate the complexities of Little Garden's hierarchical society. The protagonists' unique abilities and strategic thinking play a crucial role in their success, allowing them to overcome seemingly insurmountable odds.

The series balances action, humor, and world-building, with a focus on the protagonists' growth and their impact on the world around them. The dynamic between the main characters and their interactions with the inhabitants of Little Garden drive the story forward, culminating in a series of climactic battles and revelations about the true nature of the world they have entered. The narrative leaves room for further exploration of the setting and its mysteries, offering a satisfying yet open-ended conclusion.