An ordinary university student reincarnated into the novel “Eternal Love”, written by her at the age of 15. However, instead of arriving when the original story began, she reincarnated seven years prior to the events of the novel as Ran Romea de Lazia, the daughter of the male lead’s stepmother – a character that she didn’t even know the name of before reincarnating. Originally, the stepmother tormented the male lead, Yustaf, so much that he began to distrust other women, so Ran tries to change the events that are going to happen, yet their parents and little brother still die. With Yustaf away at the academy and his uncle in control of the family estate, Ran has to work as a housekeeper for two years and begins working on the “Male Lead Happiness Plan” where she will join him along with the female protagonist and let him have his chance at happiness.