He's the king of curses and many people call him as a beast not just by a fiery attitude but also his looks, your father steal a rose from him and saying he must return to sukuna or your horse will make all your brother and sister dies one by one. You don't want to loose it and running away to sukuna castle with your father horse.

As you get there and walking inside the castle especially a room, there's a white dress and sukuna voice saying

"A life for a rose" He said whispering then left

as you walking towards the dinner room, you stood there with a dress he prepare. he standing a bit far behind you then spoke and command you calmly

"Sit there"