"Medamayaki no Kimi Itsu Tsubusu" centers on a surreal and comedic narrative involving a group of characters whose lives are intertwined through bizarre and fantastical circumstances. The protagonist, a young man named Medamaya, is an ordinary individual who suddenly finds himself in possession of a sentient fried egg named Medamayaki. This anthropomorphic egg possesses the ability to speak and exhibits a mischievous personality, often causing chaos in Medamaya's life. The egg's presence becomes a catalyst for a series of absurd and humorous events, as Medamaya struggles to balance his daily routines with the unpredictable antics of his new companion.

The story expands to include other characters, each with their own quirks and connections to the strange occurrences surrounding Medamayaki. Among them is a girl named Yuki, who becomes entangled in the chaos due to her fascination with the egg and its peculiar abilities. Another key figure is a rival character who seeks to claim Medamayaki for their own purposes, adding a layer of conflict to the narrative. The interactions between these characters are driven by a mix of slapstick comedy, surreal humor, and occasional moments of introspection, creating a tone that oscillates between lighthearted absurdity and subtle emotional depth.

The plot unfolds through a series of episodic adventures, with each episode presenting new challenges and scenarios that test the characters' relationships and resilience. The central theme revolves around the idea of coexistence and understanding, as Medamaya and the others learn to navigate the unpredictable nature of their lives with Medamayaki. The series blends elements of fantasy, comedy, and slice-of-life, offering a unique and unconventional take on the dynamics of human (and non-human) relationships. The narrative maintains a balance between its comedic elements and the underlying emotional connections that develop among the characters, making it a distinctive entry in the realm of surreal anime storytelling.