I've read a novel about the female lead's double before, but I can't remember the name. Do you have any recommendations?

The last time he saw a female caption, he couldn't remember what it was called. There was a world where the female supporting role was a substitute for the female protagonist and was an orphan. When the female protagonist left the male protagonist, she was adopted by the male protagonist. The female lead liked bright clothes and knew how to play the violin. The male lead would force the female lead to learn something. After that, the supporting actress slowly conquered the male lead and then went to the company to deliver lunch every day. She even befriended the popular manager in the male protagonist's company. Later on, the female protagonist came back to work at the male protagonist's company, so the employees thought that the female protagonist was a mistress. Then, the supporting actress saved a kitten from a tree and met the supporting actor. Later, the female lead broke up with the male lead and went to make desserts... Anyway, the female lead ended up with the male lead.