Tatsumaki's Day Off

The monster Gigakigan comes to in a city he does not recognize and gears up to cause destruction, but Tatsumaki puts him down in an instant. She then vents to a staff member about how heavily the Hero Association leans on her. The very next day no assignments come her way, and she is informed that she has been given a day off, a gift that only irritates her once boredom sets in.

Refusing to sit idle, she starts hunting monsters on her own initiative, treating news broadcasts as her source of leads. The trail takes her to Z-City, where the creatures she was after have already been wiped out by Saitama. When the same thing happens time after time, her frustration boils over. She races to the next reported location at top speed and utterly obliterates Hotdog on arrival. Satisfied at last, she takes to the air and departs.

Tatsumaki quickly defeats Gigakigan and complains about being overused. The Association gives her an unwanted day off, and out of boredom she pursues monsters using the news. Repeated trips to Z-City reveal Saitama has already killed her targets. Enraged, she rushes ahead and destroys Hotdog before flying off content.

Released on December 8, 2015, this thirteen-page bonus chapter comes with the tenth volume and carries the Viz title Tornado's Day Off. Its cast includes Gigakigan on the cover, Tatsumaki, the Hero Association Mug, Flashy Flash, Saitama, Hotdog, and the Armored Chief Clerk. It sits between Catch & Smash and Sense.