After dying in a traffic accident, ordinary office worker Miyake Noboru is transported to a fantasy world where he is immediately found and taken in by a large, fluffy, round creature named Lime. Rather than being treated as a fellow traveler or a hero, Noboru is designated as Lime's pet. He is initially crestfallen by his new status, but quickly discovers that being a pet in this world comes with an unexpected degree of luxury and affection. Lime dotes on him constantly, offering gourmet meals, soft sleeping spots, and gentle head pats, all while completely oblivious to Noboru's human dignity. The story is a lighthearted slice-of-life comedy that follows the daily routines of this mismatched pair: Noboru, a human who is perpetually embarrassed but deeply cared for, and Lime, an enigmatic creature whose innocent, affectionate nature never wavers. Over the course of the narrative, Noboru learns to appreciate his pampered life and the bond they share, while the mystery of Lime's true identity and the wider rules of this world are gradually hinted at through small, absurd adventures and interactions with other strange beings. The series balances gentle humor with warm, feel-good moments centered on the simple pleasure of being loved.