The princess and the lord are brothers and sisters

As an idol superstar, why does he have a brainless fan sister? !It's okay to be an idiot fan, but he is still the idiot fan of the company's rival!By chance, the brother and sister traveled back to the ancient times and became husband and wife... and even exchanged genders by accident... Conspiracy, turmoil, and shock at every step, an idol star who can only be handsome, and a high school student who can only chase stars, How to protect yourself in the battle of emperors? If you pretend to be the wrong shell of your soul, where should your feelings go... Yin Rong┃ Supporting roles: Ji Yinli, Wu Yao, Rong Yujia