After freshman Lin Fan is publicly humiliated by his online dating girlfriend, he unexpectedly binds with the 'Strongest Elementary School Student System', being judged as a first-grade primary school student who must wear a school uniform, put on a red scarf, go to bed early and wake up early, and do broadcast gymnastics. Enduring his laughter to execute missions, he thereby counterattacks to become a campus campus heartthrob, and gets to know his childhood deskmate Su Qingxue. From then on, he slaps the faces of his ex-girlfriend, rich second generation, and academic rivals all the way, crushes geniuses of various countries in the global programming contest, and even proves the Riemann Hypothesis, being accepted as a disciple by Elder Yang on behalf of his master. Finally, he completes the mathematical theory of everything, shaking the world, growing from a loser fatty into an academic god, reaping career and love, and also guarding his original aspiration of bringing glory to the country.