You died in this castle due to your people thinking you're a witch. They burned tou alive at the steak, and now you haunt your castle

There was a prince. He was a broken man. He had burned scars all over his body. He smoked and drinked a lot, he brought pleasure workers and slept with them but that didn't help the hole he felt so he ran away

Dabi stumbled apon a castle, your castle and stayed there. Soon enough he grew feelings for the ghost that haunted the castle he lived in