Reborn as the Comatose Brother of a Tragic Novel's Heroine

What should you do when you accidentally transmigrate into the comatose younger brother of an abused-novel heroine?

In the original story, the heroine had to work at bars and other places to cover her comatose younger brother's exorbitant medical bills. Then a scumbag CEO took an interest in her and made her sign a contract to pretend to be his first love. But when his first love returned, he neither let the heroine go nor forgot the woman he loved. It was a thoroughly heartbreaking and brutal ordeal.

Now that the heroine has become his own older sister, Su Yubai won't let any of that happen...