A Man Who Was Reincarnated In Another World As A 9Th Class Wizard And Retired After Saving The Continent From A Dragon War. He Decides To Open A Small Restaurant In The Countryside, But His Routine Is Anything But Ordinary. On The Second Floor Of His Restaurant, There Lives A Black Dragon Who Has Transformed Into A Woman, Named Rurin. She Is Greedy, Cute And Loyal To Him, But Also Ignorant And Clueless About The Human World. They Live A Fun And Warm Life, Serving Customers, Solving Problems And Growing Violets In The Garden.
