Bullyangcheonsa Gildeurigi

A girl named Suyun lost her parents at a young age and is raised by a lenient older sibling and a sister obsessed with money, who forces her into part-time work daily. She is only allowed to keep a portion of the money she earns and spends all her time working—attending school during the day and holding down a part-time job at night. Still, she feels it is not enough. To supplement her income, she secretly takes on the role of "Guardian Angel," helping those who have been bullied by the stronger, but only for a fee.