When Tsumi, a stubborn girl with long copper hair and blue eyes, is swept away to a whole new planet, she learns of her true identity, the princess of the beautiful kingdom Mochidzuki. Having been sent away to earth during a war when she was a baby, she remembers nothing of this. However, one thing that she had given up when she went there was her memory. But she brushed it away, thinking that being princess was more important than remembering 16 years of her life. Everything is going well until war breaks out between her kingdom and another kingdom. For her safety, Tsumi is forced back to earth. What will she do when she runs into people from her past, especially when they think she is dead?