One day, I became possessed as an extra character inside the novel my senior had written. Although the setting was strangely similar to reality, I, a 29-year-old, had inexplicably become a 19-year-old student. [ Mission: Make Cha Yeowoon happy. ] [ Favorability: -20 ] [ Time Remaining: 300 days ] [ Penalty: Death ] And the appearance of this transparent message window. Will I be able to survive, to protect my favorite and complete the mission? Entering, [ Love Supremacy Zone ]