Episode 3 - Coffee Boy is Steel Arm

Ethan is the "useless" errand boy at the Super Control Bureau. But he has a secret: he’s the mysterious hero "Steel Arm." Every humiliating chore he performs—mopping floors or brewing espresso—charges his god-like power. When a mutant invasion threatens his father, Ethan must reveal the strength hidden in his "loser" hands. Can a cup of coffee save the world?