Tatsumaki's Day Off

Tatsumaki's Day Off (タツマキの体日, Tatsumaki No karada-bi) is an extra chapter included with Volume 10.

Summary
Gigakigan awakens in an unknown city and prepared to wreck havoc, but is quickly defeated by Tatsumaki. Tatsumaki then complains about the Hero Association's over-reliance on her to a staff member. The following day, Tatsumaki receives no duty calls and is told by the Hero Association staff that she complained to the previous day that she has the day off. However, much to Tatsumaki's displeasure, this lack of work leaves her bored. She decides to go after monsters anyway and uses news coverage as her informant. This leads her to Z-City, but the monsters she wished to go after were already killed by Saitama. After this incident occurred multiple times, Tatsumaki became infuriated and rushed to the next alert as fast as possible and completely decimated Hotdog when she reached the it. Finally feeling relieved, she flies off.

Characters in order of appearance

 * 1) Gigakigan (cover)
 * 2) Tatsumaki
 * 3) Lightspeed Flash
 * 4) Saitama
 * 5) Hotdog
 * 6) Armored Chief Clerk