6 : The Terrifying City -

: A powerful monster known as Kombu Infinity arrives in City Z, drawn by rumors that strong monsters gather there. After easily defeating two Class A heroes (Golden Ball and Spring Mustachio), the monster encounters Saitama.

: The Hero Association investigates the area to find the source of the high monster density, unaware that the reason most "disasters" end quickly is simply because Saitama defeats them before they can leave the area. Key Events in Episode 6 6 : The Terrifying City

: A large portion of the city has been completely abandoned by its inhabitants. While basic utilities like water and power still function, almost no one lives there because it is deemed unsafe by the Hero Association. : A powerful monster known as Kombu Infinity