Saitama returns to the battle, but is starting to get through a gloomy state because of an obvious reason. ...

An alien conqueror lands in a spaceship to conquer the Earth during the S class heroes meeting. ...

The fight with the Deep Sea King concludes and Saitama and Genos reflect on it as well as Saitama's promotion to B-Class. ...

Several Sea Folk appear and begin attacking citizens. They are easily defeated until The Deep Sea King appears and defeats many heroes including an S-Class. ...