Sakura, who has lived a life without particularly attracting attention between her talented older sister and her beautiful younger sister, is one day taken away as the bride of Kai, a prince known as the ``God of War.'' However, it is not her love or anything, but simply because she has the body to become the sheath of the ``Sword of Destruction''. She was a Sakura who was surrounded like a caged bird, but eventually her intelligence and kindness brought about a change in her cold-hearted Kai...?