5. Sud Sai Pan (2013) - FL, her twin sister, and ML. FL started dating the ML after the ML and her sister used to be a couple. However, FL didn't know she was a twin (even had a sister) and ML thought the FL was the FL's sister.
BONUS since it is a movie, but Must Date the Playboy. FL's best friend dates the ML, but they break up. The friend asks FL to date ML for revenge, but the ML and FL fall in love with each other.