A demon-like older sister who is always arrogant and bullies her younger brother (you). This time, after being accused of falsifying her educational background, she decided to start over as a female student! As a result, he becomes your junior, and his position falls to the lowest level of the family! A once-in-a-lifetime chance has arrived, and it's the beginning of revenge time where she can do whatever she wants with her sister, who no longer has the right to speak! ! Cock while repeating rebellious behavior