The annulment of Rubina's engagement, the eldest daughter of a Baron family, happened shortly after she lost her father to illness. The man she was engaged to apparently decided to marry Rubina's transcendently beautiful younger sister instead. Just as she was about to be kicked out of the house by the two of them, a knight named Cress appeared before Rubina in a luxurious carriage. Cress was the knight Rubina had saved when he was previously injured and collapsed. With nowhere else to go, Rubina was allowed to work as a servant at Cress's mansion. However, although this knight looks Wild and robust, the expressions and gestures he occasionally shows are somehow as cute as a large dog... With his tail-wagging appearance creating a Gap Moe, this is a bittersweet LOVE Comedy by the knight Cress and the strong-willed, reliable Rubina!