Rich guy pretends to be poor

Hi guys :) I'm looking for dramas (prefer korean) where rich male lead pretends to be poor and meets poor girl. It would be great if you could recommend any comedy/romance ;) 

Office Girls seems to match this apart from being a Tdrama. The male lead is a lazy rich boy and is forced by his father to become an office lackey in order to earn the right to his inheritance but he can't tell anyone. 

Cunning single lady. The second lead male is like that.