Help me find a bl manhwa pls

The storyline is about a bottom got isekai to a game, he have to rule a kingdom, but he try to run away, so the duke work under him is so toxic kind of thing, he literally rules the kingdom, not the bottom tho.

The bottom is like, a heavenly race(?) since their race is being discriminate(they trube si being sold slavery) while his people are used to be one(?) And the duke is now a fallen angel or something? Since he have dark wings…