College sophomore Charlotte Lennox is reborn back to the first day of the semester. In her past life, she kindly helped her roommate Marnie Graham handle a pregnancy scandal, but was slandered by the Zhou family, lost her Postgraduate Recommendation Eligibility, and her life was ruined. In this life, she immediately applies for Dorm Withdrawal, collects all kinds of evidence, and stays away from Dorm Room 302. After Marnie Graham's pregnancy is exposed, she continues to persuade her other two roommates Jasmine Zeller and Yvette Carter to spend money and effort for her. The two blindly take sides, hold an illegal campus fundraiser, and eventually receive a Major Demerit, suffering severe damage to their academic future and family lives. The Zhou family's attempt to shirk responsibility is exposed by chat records. Five years later, Charlotte Lennox devotes herself to her studies and grows into a group leader, while Marnie Graham lives a poor life working as a cleaner. When they meet again, Marnie apologizes and pays back the money to Charlotte, but cannot obtain her forgiveness. The story tells that people should reject bottomless kindness, and everyone must be responsible for their own choices.