Blade Man

Hong Bin is an arrogant man with an anger problem. He runs a game company, and the employees all fear him. He is always angry, and his sense of smell has gotten more sensitive. His secretary hasn't told him what happens during his blackouts when blades spring from his back, and he ranges destructively around the city.
One day, Hong Bin goes to the hospital to see his employees who were beaten by him. There, he notices an intoxicating scent coming from a woman named Se Dong.
(Source: AsianWiki)