|Saitama vs. Speed-o'-Sound Sonic: Round Two|
|Outcome||Saitama is victorious|
|Hero Saitama||Villain Speed-o'-Sound Sonic|
|Saitama is uninjured||Sonic is knocked out|
|Previous||Saitama vs. Genos|
|Next||Spring Mustache and Golden Ball vs. Kombu Infinity|
Saitama got in C-Rank class Hero and he is looking for work, then Sonic appears in the middle of the town and challenges him.
Sonic starts to create havoc trying to get Saitama to fight. Saitama see this an opportunity to count as a job and makes Sonic unconscious with a single tap on Sonic's back.
The hero association acknowledge Sonic as a dangerous criminal and Saitama is promoted.