You Took Summer Vacation, and 749 Classified You as an S-Rank Calamity

The highest-level alarms sounded simultaneously at all 108 restricted zones across the country. The senior officials at Bureau 749 stared fixedly at the blurry figure on the surveillance footage, clutching a rusty hatchet, their foreheads slick with cold sweat. Lu Qingshan, a first-year student at Dongzhou University. Trying to earn some spending money over summer break, he accidentally wandered into an E-rank restricted zone. Who could have guessed that after he killed a monster with a single swing, his dormant golden finger would suddenly awaken: every demon he killed would permanently double his vitality! From E-rank to S-rank, the death zones that terrified humanity became an endless source of experience for him. Twice, a hundredfold, ten thousandfold, a hundred millionfold! As his vitality stacked up to an indescribably terrifying level, he shattered boulders with a punch and trampled the abyss beneath his feet! When summer break ended, Lu Qingshan was on his way back to school with a sack full of demon king cores, only to discover that the authorities had already classified him as an “uncontainable humanoid disaster” and placed him on an S-rank wanted list nationwide... Faced with heavily armed national guardians and ancient gods secretly awakening, Lu Qingshan scratched his head sheepishly. “I'm really not a natural disaster. I'm just a physics student!”