Wear a Book and Become Mary Sue's Unfair Subordinate

What will happen when you go through the book and enter the text of President Mary Sue? Is it to assist the male and female protagonists? Is it to dominate the business world? Is it a harem? None! She became the president's "little wife" and became the person who made President Mary Sue give everything! Mission: Prosperity, Democracy, Civilization, Harmony, Freedom, Equality, Justice, Rule of Law, Patriotism, Dedication, Integrity and Friendship