It's an exciting tale with elements of fantasy and adventure. The theme often involves battles between good and evil, and the pursuit of power and desires.
The plot of 'A Demon's Wish' manhwa involves a demon whose wish sets off a chain of events in a magical world. There are battles, mysteries to solve, and characters with complex motivations.
Well, one big spoiler is a surprise romance development that you wouldn't expect. Also, there's a crucial decision made by a supporting character that has huge consequences. But it's better to discover these yourself while reading.
It might be that the nature of the wishes themselves is unrealistic or against the established logic of the manhwa's world. Or perhaps it's part of a greater lesson or theme the story is trying to convey.
It could be a tale of transformation and adaptation. Maybe the gangster has to deal with a completely different social environment and learn new rules.
It's quite an interesting and unexpected turn. The manhwa shows how the gangster has to adapt to the new school environment and deal with all the challenges that come with it.