In the midst of rampant bullying at Eunjang High School, timid students live in constant dread of becoming targets. However, their fortunes take a turn when Gray Yeon, a diminutive freshman standing at a mere 157 cm, astonishes his peers by fearlessly confronting and overpowering a bully twice his size. Recognized for his bravery, quick thinking, and uncommon perspective, Gray earns the moniker 'Eunjang's White Mamba.' Undeterred by his stature, Gray courageously faces off against larger, stronger bullies from neighboring schools, determined to break the cycle of oppression.