Makoto Misumi, an ordinary high school student, is unexpectedly transported to a fantasy world after his parents make a contract with the goddess Tsukuyomi. However, upon arrival, the world's goddess deems him unattractive and unworthy of being a hero, stripping him of his heroic status and banishing him to the wasteland at the edge of the world. Despite this rejection, Makoto retains the unique abilities granted by Tsukuyomi, including enhanced physical capabilities, language comprehension, and the ability to form contracts with powerful beings.

In the wasteland, Makoto encounters two demi-human companions: Tomoe, a dragon who takes the form of a beautiful woman, and Mio, a spider-like creature who also assumes a human appearance. Both become his loyal followers, bound by contracts. Together, they navigate the harsh environment, gradually building a settlement and forming alliances with other marginalized beings, such as orcs and dwarves. Makoto's pragmatic and compassionate nature earns him the trust of these groups, and he establishes a thriving community in the wasteland.

As Makoto grows stronger, his actions begin to attract attention from various factions within the fantasy world, including humans, demons, and other deities. The human kingdoms, unaware of his true potential, view him with suspicion, while the demon faction sees him as a potential ally or threat. Makoto's journey intertwines with the larger conflicts of the world, including the ongoing tension between humans and demons, as well as the machinations of the goddess who rejected him.

Throughout the series, Makoto grapples with his role in this new world. While he initially seeks only to survive and protect those close to him, his growing influence forces him to confront larger moral and strategic dilemmas. His interactions with other characters, such as the hero Hibiki and the demon general Sofia, highlight the complexities of the world's power dynamics and the consequences of his actions.

The narrative balances action, world-building, and character development, exploring themes of identity, belonging, and the impact of prejudice. Makoto's journey from an outcast to a pivotal figure in the fantasy world unfolds through a mix of humor, drama, and strategic battles, offering a fresh take on the isekai genre. The series maintains a focus on Makoto's relationships with his companions and the evolving challenges he faces as he navigates a world that initially rejected him.