Both are piano movies. I have not actually watch Secret yet but it is on my list. I assume both has beautiful OST and filmed beautifully

Both movies involve kidnapping innocent people. The psycho or gangs are brutal and inhuman. Very intense. Unbelievable this kind of things can happen

Both are about this male lead stood up the plate to help the weak and distress. His bravery, heroic, and protected instinct got himself in trouble, fight with the big gang

Both are about single mom and a child. Both movie are about kidnapping. Both were auite intense thriller. Worth watching

Both are intense, thriller, action movie. Although one is gangster the other one is a couple, they are both good acting and plot

Both are undercover movie. Very intense. Lots of action. Keep you on the seat. Good watch. Good action thriller film.

Both are about undercover cop. Very intense action movie. Brotherhood, friendship, royalty and trusting ploting, no dull moment

Both main cast are under cover. They both have inner struggle. Putting their life in tremendous danger.

Both are about the undercover cop. They sacrify their family and love life for the country and for the job. They involve in dangerous mission and duty.

Just an undercover cop film. The undercover cop know how dangerous their job is but couldn’t get out

Both involve young woman love of art/music. Struggle so much in life. Touch of romance. . True story

Both are true story about a young talented man/woman struggle with life. Amazing voice. Heart warming movie