Lin Xiaoyu, a 22-year-old social worker, accidentally traveled back to the first day of high school when she was 16 years old due to a drunken accident three years after they broke up after graduating from college. Faced with the aloof senior Lu Chen who she remembered as "cheating on the beauty of the mathematics department in the future", she set a flag: "I will definitely take the initiative in love this time!" But unexpectedly, the more she tried to avoid the ending of BE, the more she fell into the scene of "chasing the wife (crossed out) chasing the husband with a slap in the face" - such as in the cafeteria Accurately uncovering the senior's dietary taboos, messing up the relay race with "predicting the future" hand skating at the sports meeting, and even staged a large-scale "I'm not interested in men" scene in front of the senior... A campus counterattack with a "God's perspective" but full of loopholes has just begun!