One morning, an elderly woman encounters a stray cat rummaging through trash bins for food and decides to bring him home to provide a proper meal. Although she is startled to discover that the cat, named Tsushima, can speak, she still chooses to adopt him and indulges all his whims. Ore, Tsushima chronicles the hilarious adventures of the gluttonous and lazy Tsushima leopard cat within his new foster family.