I recommend "It's Just You" to you. The male protagonist was a prodigal son of a wealthy family who mingled in the underworld. The female protagonist was an ambitious and smart girl who approached the male protagonist to expand her power in order to take revenge on her ex-boyfriend. The male protagonist gradually appreciated the female protagonist's cleverness and wit, and the two of them began to spark. I hope you like this fairy's recommendation. Muah ~😗