Daywalker 

National Intelligence Service black ops agent Suhyeok is tasked with assassinating Nanayama, the Yakuza leader heading a drug trafficking organization in Korea. To his surprise, the target is a captivating woman named Anna, who appears disconnected from any violence. Sensing something amiss with his mission, Suhyeok embarks on a path of vengeance against both the National Intelligence Service, which has betrayed him, and Nanayama, who massacred his comrades. (Source: Naver, translated)