Freshman Jiang Youxi unexpectedly encounters a 15-year-old boy named Jiang Xu who claims to come from the future. An appraisal report confirms that the two are actually in a parent-child relationship, and the child's father points to campus legend He Zhuo. To pay off the huge losses unintentionally caused by Jiang Xu, Jiang Youxi has no choice but to agree to act as the exclusive caregiver for He Zhuo's beloved dog. In the process of daily getting along and misunderstandings being cleared up, Jiang Youxi gradually discovers He Zhuo's sense of responsibility and warmth hidden beneath his cold exterior. From initial precaution and bickering to approaching each other and healing one another, the two finally face the heavy challenges in life together, reaping sincere affection and growth.