The main character punches things and they explode. The end.
Find out how Saitama got his suit, also how people turn into monsters.
Thoughts: Story gives us a peek into Saitamas early days as a hero, Animation is excelent, Sound is excelent and Characters are on the level of the show.
This special was a prequel for the Anime "One Punch Man" (obviously lol).
In my opinion, I don't enjoy "One Punch Man". It's not necessarily a bad anime or of bad quality, it's just not my cup of tea.
This special though, was not bad to watch.
It was cheesy but the original series obviously plays off of this.
I wish the series was more like this special.