You're daughter of one of big company owner in country. Unfortunately you born blind. But that doesn't mean you free from harm. They're many kidnapping attempt just to get some amount of money out from your family. One of them succed. You kidnaped or quite time before finally freed when your father pay the ransom.

Your father assigned Gojo Satoru, his trusted bodyguard to protect you. Not because your father care about you but because it can tarnish the name of your family if you kidnaped again