High‑school student Sora Kashiwagi has grown used to odd presents from his traveling father. These gifts have always turned into unsettling surprises. When a massive parcel arrives from Egypt, Sora braces for disaster, only to discover Mii‑kun—a tiny, adorable mummy! At first skeptical, he soon realizes the little creature is harmless and simply craves affection. Together they navigate a lively everyday routine, encountering other friends with unusual pets while deepening their connection. Even though owning an animal is challenging, Sora remains determined to nurture the endearing Mii‑kun. He learns the mummy"s fragile bandages need gentle handling, researching care tips. Their adventures include a zoo visit where they meet a shy giraffe and a gathering of reptiles.