Why You Don't Know It's a Girl?

Kang Jae-hee is no ordinary woman. Formerly a living weapon in an elite special forces unit, she possessed physical power and combat skills that far surpassed those of any man. After being honorably discharged from the military, she joined the police force of the Republic of Korea, dedicating herself to upholding justice. Her routine shifts take a dramatic turn when she is assigned a massive undercover mission: she must infiltrate Samgang Group, South Korea’s leading conglomerate, by becoming the personal secretary to Yoon Yi-joon. As a second-generation chaebol heir and the prime suspect in the murder of his former female secretary, he is her primary target, and her objective is to uncover the truth behind his alleged crimes. However, working as the secretary to the notoriously difficult Yoon Yi-joon proves far more terrifying for Jae-hee than actual warfare or military drills. To make matters worse, her carefully constructed cover faces an unexpected threat when her boss suddenly makes an earnest confession of love. There is just one glaring problem—she is currently disguised as a man. What follows is an unpredictable romantic comedy featuring a quirky, four-dimensional chaebol heir and an impenetrable, girl-crush-inducing iron-willed heroine navigating a web of secrets and sudden romance.