There aren't many people in One Punch Man who can bring it out of him, but when the going gets tough, Saitama gets serious. The aptly named Killer Move: Serious Series is a series of moves that ...

In the heat of the battle against Cosmic Garou, Saitama began to exhibit a lot of his move set, which he had never done before. These were all parts of his 'Serious Series', and redefined what ...