Intern Chen Cixiu accidentally enters a flash marriage with female CEO Jiang Yu. Starting from an unexpected beginning, he gradually comes to understand responsibility and true heart within marriage. Facing workplace tests, family scrutiny, and outside gossip, he never retreats. With actions, he proves that love has nothing to do with age and status, and true growth is becoming a better version of oneself in the process of guarding the person one loves. This comic drama is adapted from the Tomato Novel "Just Graduated, Pulled by Sister into a Flash Marriage" by author "Yi Qu Fu Jiang Shan".