The CEO's Assassin Bodyguard

Lana Ashworth, the beautiful president of Ashworth Group, is targeted by various powerful forces and faces constant trouble after developing a life-extending biological agent. Leo Lennox, the number one King of Assassins, grows tired of the underworld and decides to return to a normal life. Due to a promise with his Master, he becomes a security guard at Ashworth Group to protect Lana Ashworth and the new drug. Already invincible, he embarks on a path of putting everyone in their place.