Yun Ju-sang

When a thief driving a motorcycle steals a purse of a pedestrian, the clumsy, naive and honest rookie policeman Sang-hwan runs after him, but the skilled specialist in martial arts Wi-jin captures the criminal and Sang-hwan is severely injured. She brings Sang-hwan to her home, where the six Masters of Tao heal him and believe that he has a powerful Qi, the spiritual energy of the universe, and could be a powerful warrior... (imdb)

The story concerns a group of fiends and flat-mates who outwardly seem like a regular bunch of youthful Korean males. Unknown to those around them, they are in fact assassins at large. After a particular assignment, they stop for a little self reflection and life analysis. By 'little', I mean almost the whole movie. Things pick-up again when they are offered a hit that they (for their own male-ish reasons) can't refuse. (IMDB Comments)

Detectives Chu Ja-young (Shin Eun-Kyung) and Kim Dong-wook (Eric Moon) are investigating a string of murders involving local high school students. Scraps of a diary are found with each victim, leading the detectives to suspect the writer of the diary, a middle-school student who's suffered serious bullying. Each murder happens just as described in the so-called 'June diary', but the student is already dead... (asiacue.com)

A story where ten people get the chance to go back in time by one year, but unexpectedly mysterious situations start to arise when their fates are changed and twisted in the process. (imdb)