She's on Duty

She's on Duty is an action-packed comedy that follows the story of Jae-in, a boisterous detective who goes undercover in a high school to protect the daughter of a notorious gangster. With the help of her handsome classmate and next-door neighbor, Kang No-young, Jae-in must navigate the challenges of high school life while also keeping her true identity a secret. As Jae-in and No-young work together to take down the gangsters, they discover that they have a lot more in common than they initially thought. But as they get closer to solving the case, Jae-in's past comes back to haunt her and she must confront the demons that have been following her all along. Will Jae-in be able to complete her mission and find love along the way?

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Some movies that have similar genres and were produced around the same time as She's on Duty include Charlie's Angels, The Man (2005), The Machine Girl, RED, Postal, OSS 117: Cairo, Nest of Spies.