Killing Line summary: Mako, a JK who wears a catsuit and wants to be loved, is in the biggest pinch of her life when a ruthless hitman appears! Mako, who has been left alone since her father disappeared, decides to start a daddy's life. On her first night, while she is taking a shower after finishing her business, her father is killed by a hitman, and Mako is on the verge of being killed as well. Mako is in a desperate situation, but the hit man seems to know about her. This is a once-in-a-lifetime opportunity! Selling flattery in order to survive! Operation Fake Lover is about to begin!