Hello, looking for the title of this novel. All i remember is: Might be a transmigration novel. Female MC saved the person (is not ML) she is engaged to, he broke up the engagement not knowing it was her, he regrets it. She might have been an assassin. She has her own organisation, same with ML. I think their organisations are rivals but they don't realise until the end when she went to confront his organisation for capturing her people. Her "mother" gave her a mask that changes her appearance. That is all i can remember. Any help is appreciated. Thanks <3