For the past three days, my older sister has been my personal maid. (Shiina Sora MIAA-049)

My older sister is adorable but strict. She gets furious when she sees my hidden test papers. If I study hard and get a perfect score, I make her dress up as a maid and spend three whole days alone with her! I have to listen to everything my mistress says, even if she's angry, I still obey her orders. I enjoy it so much that I become more and more obedient!