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.
As lord of the Clan of the Seafolk,
this world is mine to rule.
،بصفتي حاكم عشيرة أهل البحر
.أصبح هذا العالم تحت حُكمي
Anführer des
Clans der Tiefsee
Sono a capo della stirpe degli abissali
e conquisterò il mondo intero.