The Greatest Hero Of All

In this story we see our bald hero Saitama become a symbol of strength and peace as he takes on the strongest enemies the earth has seen. This all started when he was walking back home and out of nowhere he sees a young girl with green hair fly towards one of the buildings, as she's about to get killed by the monster Saitama sends a normal punch and instantly kills it. As she falls accepting the fact that she's going to die Saitama saves her and carries her to his house to help her out. Find out what happens...

(Some spoilers from the webcomic)