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.
The threat level has been
raised from Tiger to Demon.
.ارتفع مستوى الخطر من نمر إلى شيطان
Das Gefahrenlevel wurde
von „Tiger“ auf „Dämon“ angehoben.
Le niveau de fléau
est passé de Tigre à Démon.
Il livello di calamità
è salito da "tigre" a "demone".