My sister became my personal maid for three days.

My cute but strict sister always gives a sermon about test scores. They say they'll listen to anything if they get the good points... and I've been given a maid! Because your master is absolutely certain, I will accept sex while saying, "I'm your sister..." My sister, who was reluctant to my dick, began to want it at the end... A tsundere maid work filled with Shiina Sora's cuteness and sex!