Your arrogant, demon-like older sister has always bullied you. But now, her academic fraud has been exposed, and she's been ordered to repeat her time as a schoolgirl! As a result, she's fallen to the very bottom of the family hierarchy, becoming your junior. A once-in-a-lifetime opportunity has arrived—it's time for revenge! Now that she has no say in anything, you can do whatever you want with her once you get home. This is Shoko Akiyama's first uniform work, where she repeatedly puts up a rebellious front but loses to your cock every single time!