Disaster Level

Disaster Level (災害レベル, Saigai Reberu) is an extra chapter included with Volume 13.

Chapter Notes

 * This omake marks Air's manga debut
 * Smile Man is revealed to have 2 brothers Crying Man and Angry Man
 * This special takes place inbetween the King Arc and the Garou Introduction Arc, as Saitama is rank 33 at this point.