Twin Theme

Hi, drama lover

I hope I can watch a show where the lead character is twin. But with this condition:

1. Nobody (Their friend/colleague/lover) aware that they are twin. 

2. They will reveal or get caught in front of a lot of people. And the twin makes people shocked

Show type can be a movie, drama or anime.
Country can be from anywhere: korea, china, japan, USA, India, thai, etc.

Please let me know if you remember something like that

Thanks