second male lead thinks male lead isn't good enough for the female lead

The male lead loves the female lead, but the second male lead thinks the male lead isn't worthy of her. The male lead is a non-rich nice guy, the female lead is a rich nice girl and the second male lead is a rich asshole. Maybe at some point the female lead goes for the second male lead because she doesn't like the male lead yet, but then realizes her love and they get together.

My Mr. Mermaid - Female lead is a sports journalist, male lead is a swimmer, second male lead is a rich man who thinks male lead can't take care of the female lead because of his job