Saitama vs. Pluton

Saitama vs. Pluton is a battle between Saitama and King of the Underworld, Pluton. It is also the final battle to take place in Season 1 of the anime.

Prologue
Pluton is first seen in Z-City, but has now appeared in Y-City. He continues to wreak destruction and is about to kill a child, but not before Genos arrives with Saitama.

Battle
Genos announces that he has arrived with a great man who is a hero for fun and his master. Saitama arrives and kills Pluton in one punch.

Aftermath
Pluton is dead. Saitama is upset once again that he is back to killing monsters in one punch.