Chocolate Coated Garlic's feed

So the story started with a bullied girl, the bully was so bad she end her life by jumping from a building (Idk the detail). The father of the girl adopted other girl her age, but she's not just an ordinary girl, the adopted girl is actually an assassin and the father hire her to revenge on people who bullied his real daughter

Or anyone have recommendation manhwa about revenge on bullies?