Chen Lin's mundane routine of delivering cafeteria lunch boxes to lazy students takes a dramatic turn when he walks into the mathematics department study room. There, the brilliant but disheveled department goddess Shen Yan and her teammate Li Zihan are locked in a fierce, deadlocked argument over an epidemic modeling simulation. Just as Chen Lin prepares to make a quick exit to avoid the awkward tension, the bizarre Growth System activates in his mind, prompting him to recite the basic multiplication table. Instantly armed with the Little Mathematician title, Chen Lin looks at the chaotic blackboard and suddenly understands the complex equations as if he were a lifelong genius. In a stunning reversal that leaves the entire room dumbfounded, the simple delivery boy casually points out the fatal flaw in their model, identifying the hidden interaction between the gamma disturbance and the asymptomatic transmission coefficient. This effortless intervention saves their project just hours before the submission deadline, leaving the academic stars of the university scrambling to verify his claims. Shen Yan, driven by frantic urgency, commands her teammates to pull up the iteration records and verify the claim, only to find that the delivery boy's casual suggestion is mathematically flawless. As Chen Lin quietly slips out of the room to resume his deliveries, the four girls are left in a state of absolute shock, whispering about whether they have just encountered an eccentric genius. Meanwhile, Shen Yan is so captivated by this mysterious savior that she immediately sends him a friend request, eager to discuss further advanced equations. This dramatic encounter sets off a chain of events that will drag the low-profile literature major into the intense academic spotlight, leaving him to wonder if his quiet college life is gone forever, especially as Shen Yan sends a message stating she is willing to book a hotel room near the school just to wait for his guidance, unaware that her desperate pursuit of mathematical truth is about to spark a massive wave of romantic gossip across the entire campus.

Recognizing the immense commercial value of his rule-based mathematical abilities, Chen Lin decides to retire from low-paying physical labor and pivot to high-end consulting. He sets up a premium shop on the second-hand marketplace platform Xianyu, offering homework help and project consulting at the eye-watering rate of eight hundred and eighty-eight yuan per hour. To build credibility, he borrows the academic credentials of his first client, Shen Yan, who has become deeply impressed by his genius and regularly pays for his private tutoring. The outrageous pricing soon attracts Sun Yu, a desperate graduate student working at a prestigious engineering design institute in Modu, who is stuck on a critical structural stability calculation that threatens his probationary employment. Testing Chen Lin with a complex numerical integration problem, Sun Yu is thoroughly shell-shocked when the mysterious seller returns the correct answers within three minutes, easily beating a state-of-the-art artificial intelligence model. Desperate to save his career, the graduate student eagerly purchases a premium three-hour package, initiating a high-stakes remote consultation where Chen Lin explains advanced algorithms with absolute, terrifying composure. Sun Yu can only listen in silent worship as this young voice effortlessly deconstructs the engineering bottleneck, providing a flawless hybrid approach that combines incomplete Cholesky factorization and the Jacobi-Davidson method. This successful transaction not only secures Chen Lin a handsome profit of two thousand yuan but also leaves the entire engineering institute in a state of frenzy, as their top technical directors realize they have stumbled upon an unfathomable mathematical master who could revolutionize their entire industry. The president of the institute immediately orders Sun Yu to establish a long-term partnership with this mysterious consultant at any cost, unaware that Chen Lin is merely a literature major operating from a cheap hotel room near campus, desperately trying to avoid a curfew while keeping his god-tier system a closely guarded secret, setting up a thrilling game of cat and mouse as professional corporate entities begin tracking down the digital footprints of an elusive college sophomore.

As Chen Lin's reputation spreads, he must constantly manage the chaotic fallout of his multiple system-enhanced identities across Yannan University. After completing a simple running quest, he unlocks the Little Champion title, which permanently doubles his physical attributes and allows him to sprint across campus at Olympic speeds, leaving witnesses whispering about a mysterious track-and-field phantom. Meanwhile, his roommates discover a blurry photo on the campus forum showing Chen Lin walking intimately with the elusive department goddess Shen Yan, sparking a hilarious interrogation in dorm room four hundred and six that forces him to promise a celebratory barbecue feast. To add to the chaos, Chen Lin takes on a singing gig at the Back Street Bar, where the Little Singer title grants him flawless pitch and rhythm, enabling him to deliver a jaw-dropping performance of a highly technical ballad that completely silences the arrogant campus star Song Cheng. This spectacular musical duel earns him thousands of yuan in tips and catches the attention of the brilliant band leader Yunqing, who becomes deeply intrigued by this multi-talented literature major who seems to excel at everything he touches. When Yunqing later corners him in the library and playfully threatens to expose his secret walks with Shen Yan, Chen Lin is forced to navigate a delicate social minefield between two of the university's most famous beauties. The tension escalates dramatically when both girls end up helping him move heavy musical equipment at the College of Arts building, culminating in a terrifying accident where a massive speaker falls toward them, forcing Chen Lin to push his physical enhancements to their absolute limits to save them from disaster. Although he successfully shields them from the impact, the sheer physical strain and the mysterious new rewards triggered by his heroic act leave him standing at a critical crossroads, where his secret double life threatens to burst wide open in front of the two girls who have slowly begun to realize that this ordinary literature student is anything but normal.

Chen Lin's casual side hustles begin to ripple outward, eventually catching the attention of the nation's most respected scientific authorities. In Jiangsu Province, a wealthy high school student named Liang Xiaodong hires Chen Lin to solve a notoriously difficult math quiz, only for his grandfather, the legendary academician Liang Tianshi, to recognize the profound and elegant genius hidden within the handwritten solutions. Recognizing a generational talent, the retired titan contacts the ambitious principal of Yannan University, Chang Kai, requesting that the school keep a close eye out for any breathtakingly brilliant mathematics undergraduates. This high-level inquiry sparks a frantic search within the university administration, leading the vice-dean of the mathematics department, Gu Ming, to mistakenly identify the brilliant sophomore Shen Yan as the genius in question due to her sudden academic breakthrough. As the university plans a grand regional conference to showcase Shen Yan's modeling achievements and invite Academician Liang as a special guest, Chen Lin continues to operate quietly in the shadows, unaware that his brilliant solutions have set a massive academic machinery in motion that will inevitably drag him into the national spotlight. Meanwhile, his personal net worth begins to grow exponentially under the passive influence of his newly acquired Little Financial Planner title, which compound-interests his savings by twenty percent every month. As the summer vacation begins, Chen Lin prepares to officially transfer to the mathematics department, setting up an explosive collision of expectations where the university administration, the national academician, and his female clients will all simultaneously discover that the legendary genius they have been searching for is none other than the low-profile literature student who has been delivering their food all along. With the regional conference looming and the academician arriving on campus with the sole purpose of meeting this mathematical savior, Chen Lin must decide whether to continue hiding in the shadows or step onto the grand stage to claim his rightful place as a national scientific prodigy.