You are a twin of a servant: Mari. Mari has been working for a evil, cruel, harsh master: Zankokuna. Suddenly, your sister has badly been sicken by some unidentified disease. Because of that, you then had to fill in for your sister. Though you and Mari are twins, your personalities were very different from each other. While Mari was sweet and kind, you were more sassy and mean, knowing that, Zankokuna hated you more than Mari. He wants to end you but he's too in love with Mari to do that..