Mảng Tối, Your Noir (2013)

Hyung Joo, a member of a gang, starts to track a woman. This woman happens to be the wife of a prosecutor investigating his gang. She was also Hyung Joo's teacher when he was young, and he had a crush on her back then. Despite the years that have passed, Hyung Joo still harbors feelings for her.

(Revised)

Hyung Joo, a gang member, embarks on a mission to surveil a particular woman. Unbeknownst to him, this woman is the wife of a prosecutor assigned to investigate his gang. What's more, she was once Hyung Joo's teacher, and he had developed a fondness for her during his childhood. Even after all this time, Hyung Joo's affection for her remains intact.