E12 - The Strongest Hero

Released on 20 December, 2015

In this episode, Saitama continues his battle against Boros and the Dark Matter Thieves. Despite Boros' regenerative abilities, Saitama delivers the final, overwhelming blow. The Hero Association faces an aftermath of the destruction caused by the battle. Saitama's hero status remains largely unrecognized, as he still holds a low rank. The season ends with Saitama's heroic deeds still unnoticed by the public, maintaining his humble persona.