Being a Killer Teacher Is a Blast

Neon lights shimmer in the rain, their cold reflections of a life slipping away caught in golden-rimmed lenses. He is “Shuang Waiwai,” a top assassin feared across the dark web. A slight push against his glasses, and he can calculate thirty-seven lethal angles. After an ordinary mission, a ruthless order from the organization sends him into a sun-drenched school: infiltrate Xinghua Private High School, pose as math teacher Ye Feng, and monitor Lin Xiaoyu, an unremarkable girl in Class 7 of Senior Year. When the chance comes, eliminate her father, Lin Guodong, a leading scientist on the Tianshu Project.

The teacher's podium becomes his new sniper's perch. Faced with a noisy, chaotic classroom, he drives a chalk stub packed with terrifying force straight through a desk, crushing the bravado of everyone who dares challenge him. A rolled-up lesson plan snaps the ribs of school bullies.

The class's hidden warmth quietly melts his icy defenses, while threats from the underworld awaken his instinct to protect. When the organization's cold warning and the truth about the Tianshu Project, a matter of national security, are laid before him, and his former fellow disciple “Poison Scorpion” slips into the school bearing a deadly fragrance, Shuang Waiwai's gun is, for the first time, no longer aimed at its assigned target. The podium and the battlefield merge; chalk dust and blood fly together. To protect the students who once saw him as a “monster,” and to shield a father worthy of respect and a national treasure, he stakes everything on a traitor's path of no return, becoming a shield and declaring war on the entire dark organization! From cold-blooded killer to nameless protector, can Ye Feng carve himself a path to humanity through chalk dust and bloodshed? The answer to the final math problem in the classroom has already been written across the blackboard: **A (protection) + B (killing) = home**.