My cute but strict older sister was furious when she found my hidden test. Since I studied desperately and managed to get a perfect score... I made her become my maid. I'm going to bet everything on these three days alone with her. The master's word is absolute, but her true self still comes out; she pouts when we do erotic things, yet she still obeys my orders. She gradually becomes submissive because it feels too good. A tsundere maid work featuring Minami Hatsukawa!!