Volume 4

"Giant Meteor" is the fourth volume of the One-Punch Man manga series.

Summary
Saitama is now a certified hero! And with that title comes great responsibility-he's required to perform one heroic deed per week. While Saitama makes the rounds to meet his quota, and incoming threat from outer space is screeching toward Earth...

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Chapter List

 * 21st Punch: Giant Meteor
 * 22nd Punch: Voices
 * 23rd Punch: Threat from the Sea
 * 24th Punch: Deep Sea King
 * Volume 4 Extra
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Release Info

 * Release date: August 2, 2013
 * ISBN: 978-4-08-870871-3
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Volume Notes

 * Black Sperm makes a cameo in the volume.