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.
| Creator | N/A |
|---|---|
| Actor | Makoto Furukawa |
| Country | Japan |
| Production | Madhouse |