I Survived to the End at Fourth Master's House by Signing In

Su Xiaoyu, a modern society girl, is dressed as a small transparent maid of the same name in the fourth master's house, and is bound to the "strongest sign-in system". Her goal is: not to fight for favor, not to take sides, and rely on one lottery every day to be in the center of the future storm of "Nine Sons to Seize the Progeny", to enjoy the show and survive until the finale!