When a Man Falls in Love (2013)

Han Tae-Sang is a former gangster, but now a successful business man. He has a cold-blooded decisiveness and incredible drive. This helped him to attain his current status, as he started with nothing. He then meets a younger woman named Seo Mi-Do. Her personality reminds him of himself when he was that age. Han Tae-Sang begins to feel love for the first time in his life.