The boy named "Han Gyu-Hwan" who had no choice but to transform from a weakling to a hero....
A shockingly disappointing manga from Kim. MC was getting bullied until he found a shotgun with 30 shells. He decided to take revenge but weird monsters start showing up so he has to choose who to kill and who to spare. The execution was dogshit, the self righteous girl tells MC that revenge is bad even though all she did was make his bullying worse, not to mention his bully is currently a monster who's eating other students but sure, life is all sunshine and rainbows.