A pack of monsters calling themselves the "Clan of the Seafolk" arrive on the shores of City J intent on invading the land. When the hero sent to fight them is defeated easily by the Deep Sea King himself, Saitama and Genos head for the city to help.
I-I'm a hero too!
!أ-أنا بطل أيضًا
I-Ich bin auch ein Held!
Je suis un héros, moi aussi !
Je suis Gominator !
Anch'io sono un eroe!
Entra in scena All Back Man!