an Entity references as follows:
One-Punch Man (Japanese: ワンパンマン, Hepburn: Wanpanman) is a Japanese superhero manga series created by One. It tells the story of Saitama, a superhero who, because he can defeat any opponent with a single punch, grows bored from a lack of challenge. One wrote the original webcomic manga version in early 2009. As of June 2012, the original webcomic manga surpassed 7.9 million hits. As of April 2020, the manga remake had sold over 30 million copies worldwide, making it one of the best-selling manga series.