Miss sister's happiness is protected by me [Quick Transmigration]

Ms. Kan Qing of the gnawing old family was kicked out of the house by her parents, and she went to the street to apply for a job after living in a rented house for more than half a year with insufficient savings. Then——she was bound by a counterattack system that claimed to be a young lady!System: Your mission is to save the little sister and the water and fire, so that they can live a life of worry-free and happy life!Kan Qing: Oh.System: You, what, I asked you to do the task not to involve myself in it...