The whole class is making trouble, am I the only one who is honest?

My name is Gu Yuan, and I’m the class monitor of Class 7, Grade 1. Our new head teacher is a middle-aged man who claims to be "all-knowing and all-powerful." On the first day of school, he tells us: "I will destroy the world in three years, and you must kill me during that time." The class is collectively confused. Then he starts teaching us all kinds of absurd superpowers—shadow clones, transformation techniques, energy waves, substitute messengers, mecha construction. I thought the world was doomed. But it turns out all my classmates are secretly eccentric geniuses. Once they gain extraordinary abilities, no one actually thinks about killing the teacher or saving the world. On day one, someone uses a body double to make the entire school dance in public. On day two, someone pours spiritual energy into the city’s water supply, and the average lifespan of the residents skyrockets. On day three, someone releases a "parasitic beast" and searches the city for the "Chosen One." They secretly control everything, turning the whole city into a real-life sandbox game. And I, the only honest person in the class, am struggling to keep a fragile sense of normalcy intact. Until one day, I realize that a formation I accidentally set up has covered the entire planet. My classmates send congratulatory messages: "Monitor, didn’t you say you were the honest one?" I reply, "...This formation wasn’t set up by me. It grew on its own." This book is also known as "Three Years Promise?" "Don’t Rush, Play First" "My Classmates Are All Secret Bosses" "We Agreed to Be Lazy Together, and You Secretly Became a God."