One Punch Man, Vol. 4

One. One Punch Man, Vol. 4. 2015. 210p. ISBN 9781421564616. 

Now that he achieved class-C hero in One Punch Man, Vol. 3, Saitama needs to perform and report one heroic deed a week. Genos, as a class-S, is called to the headquarter of the Heroes' Association, only to find out that everyone has evacuated. Bang, another class-S hero, is the only one here. A large meteor is plummeting towards their city, and when it hits it will destroy everything. Genos determines to go for broke, and he uses all of his energy to power his incinerator cannon, but it is ineffective. Another class-S hero intervenes, but only to test a prototype weapon which also proves ineffective again the meteor.

Saitama comes to the city's rescue, and destroys the meteor before it hits, but the pieces fall all over the city, blasting buildings apart and killing score of citizens. Jealous class-B and class-C heroes badmouth Saitama, identifying him as being responsible for the people's misery now that the city is ruined, but Saitama fully assumes the role of meteor destroyer.

Meanwhile, in a neighbor city, monsters from the Seafolk have emerged from the water, looking to kill and eat humans. As heroes rush in to fight the monsters, will Saitama and Genos get there in time to get any of the action?

The story continues in One Punch Man, Vol. 5.