When aliens invade Earth, a group of Class-S heroes finally finds a way to fight back and go on the offensive. Inside the enemy mother ship, Saitama fights Boros. Faced with the alien's frightful power, he decides to get serious! What is the Earth's fate?!

Author/Artist: One / Yusuke Murata
Grades: 7-12
Ages: 12-17
Publisher: Viz Media
Page Count: 216pp
Size: 5 x 7.5
Notes: paperback, b/w
Date of Publication: July 6, 2016
ISBN: 978-1421585284