"Suppose a Kid From the Last Dungeon Boonies Moved to a Starter Town" is a fantasy-comedy manga series that revolves around Lloyd Belladonna, a young boy from the remote village of Kunlun, known as the "Last Dungeon." Despite being the weakest resident of his village, Lloyd possesses extraordinary strength and abilities, though he remains unaware of his own power due to the village's exceptionally high standards. Believing himself to be ordinary, Lloyd leaves Kunlun to pursue his dream of becoming a soldier in the capital city of Azami, a "starter town" by comparison.

Upon arriving in Azami, Lloyd's naivety and lack of awareness about his own strength lead to a series of comedic and chaotic situations. His interactions with the city's inhabitants often result in misunderstandings, as his seemingly mundane actions—such as casually lifting boulders or defeating powerful monsters—are perceived as extraordinary feats. Lloyd's humility and kind-hearted nature endear him to those around him, though his obliviousness to his own abilities continues to cause confusion.

The story introduces a cast of supporting characters who play significant roles in Lloyd's journey. Among them is Marie, a skilled magician and soldier who becomes Lloyd's mentor and close friend. Marie quickly recognizes Lloyd's potential but struggles to make him aware of his own strength. Other key characters include Selen, a noblewoman with a sharp tongue and a hidden soft side, and Riho, a pragmatic mercenary who forms a bond with Lloyd. Together, they navigate the challenges of life in Azami, often finding themselves entangled in adventures that highlight Lloyd's unique talents.

The narrative blends elements of fantasy, action, and humor, with a focus on Lloyd's growth as he adapts to life in the city and interacts with its diverse inhabitants. The series explores themes of self-discovery, friendship, and the contrast between rural and urban life, all while maintaining a lighthearted and comedic tone. Lloyd's journey is marked by his unwavering determination to achieve his dreams, even as his extraordinary abilities continue to shape the world around him in unexpected ways.