|Stinger vs. Seafolk|
|Arc||Sea Monster Arc|
|Outcome||Stinger is victorious|
|Abilities and Techniques|
|List of Fights|
|Previous||Saitama vs. Tanktop Tiger and Tanktop Black Hole|
|Next||Lightning Max vs. Deep Sea King|
An octopus-like Seafolk appears on the surface of the Earth, claiming their kind will take over the surface before it is killed by Saitama. Later its fellow Seafolk appear from the ocean and cause havoc in J-City. One of the monsters grabbed a citizen with its tentacle, threatening all that stand in his way. The monsters tentacle was cut by A-Class Rank 11 hero Stinger and saved the citizen. The hero introduces himself to the crowd of fans and monster as he challenges them to a fight.
The scene later fast forwards to a wounded Stinger facing down four Seafolk after killing six of them. Stinger unleashes his technique Gigantic Drill Stinger followed by Quadruple Thrust to kill the final Seafolk and claim victory.
While Stinger celebrates his victory thinking he stopped a God-level threat, the Deep Sea King appears and defeats him in one punch.