"Sasaki and Peeps" centers on Sasaki, an ordinary office worker who leads a monotonous life devoid of excitement. His routine takes an unexpected turn when he purchases a small bird, Peeps, from a pet store. Unbeknownst to Sasaki, Peeps is no ordinary bird but a powerful being from another world capable of speech and magic. Peeps reveals that it is a sage from a magical realm and offers Sasaki the opportunity to travel between worlds, granting him access to both modern Japan and a fantastical medieval universe.

In the magical world, Sasaki discovers a society filled with knights, mages, and political intrigue. Peeps guides him through this new environment, teaching him magic and helping him navigate the complexities of this unfamiliar realm. Sasaki’s newfound abilities and knowledge from the magical world begin to influence his life in modern Japan, where he starts to use his powers to solve problems and improve his mundane existence. However, his actions in both worlds attract attention, leading to encounters with otherworldly beings, rival mages, and individuals who seek to exploit his abilities.

The narrative explores Sasaki’s dual life as he balances his responsibilities in both worlds. In the magical realm, he becomes embroiled in political conflicts and power struggles, while in Japan, he faces challenges that test his morality and resourcefulness. Peeps serves as both a mentor and a companion, offering wisdom and support as Sasaki navigates these parallel realities. The story delves into themes of self-discovery, the consequences of wielding power, and the interplay between ordinary life and extraordinary circumstances.

Key characters include Sasaki, whose growth from a passive office worker to an active participant in both worlds drives the narrative, and Peeps, whose enigmatic nature and vast knowledge provide the foundation for the story’s fantastical elements. Supporting characters from both worlds, such as knights, mages, and modern-day acquaintances, contribute to the unfolding plot, adding depth to the interconnected storylines. The series blends elements of fantasy, slice-of-life, and action, creating a narrative that balances the mundane with the extraordinary.