i want to find drama by describing a scene!

Hello, I am looking for a drama but I don't remember its name. and if its chinese or south korean, The drama is about a man from a rich family and his girlfriend wants to buy an expensive house, but he doesn't have the money. His brother is rich and he is the one who has the money, and his girlfriend may have cheated on him. I don't remember well. Then mc he start a software company and may be find love a don't really remember.