My cute but strict sister always lectures me about my test scores. She said she'll do whatever I say if I get good marks... so I asked her to be my maid! She obeys her master's orders, so she even accepts sex, saying, "I'm just your sister, but..." My sister resisted my dick at first, but in the end she started to want it... This tsundere maid work is full of Shina Sora's Ke'ai and sexiness!