Double Face: Sennyuu Sosa-hen (2012)

Double face is a remake of Hongkong Movie, Internal Affairs, meanwhile The New World is a movie that is inspired by Internal Affairs movie. You'll find a lot of similarities between these two.

They obviously took the flashback and made an entire movie for the Japanese movie special from Internal Affairs II. The story is about a cop who has been undercover for over 10 years since finishing the Police Academy and only one person knows he is a cop.

This rec. is purely based on the actors; both Kagawa and Nishijima are in both doramas.

This is rec.most of cast ,grenres r same.both of drama r from Eiichiro Hasumi .if u like one give a chance to other one