Assigned to guard a VIP and his son, Metal Bat couldn’t be less thrilled. But when the group is suddenly attacked all hell breaks loose. Meanwhile, Saitama has disguised himself as Charanko in order to enter the “Super Fight” martial arts tournament.

Saitama brings Genos to a tournament for the fighting video game “Wild Animals” due to the grand prize being five million yen. Several locations all over the country are being used as venues, and the battles take place online.

One stormy night, a monster emerges from a junkyard and begins making its way towards Smelly Lid Prison. Noticing its approach, Puri-Puri Prisoner breaks out of his cell and quickly defeats the monster. However, he damages the prison’s electricity in the process, allowing a handful of inmates to escape.