|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 Mustachio and Golden Ball vs. Kombu Infinity|
Saitama, now as a C-Rank class Hero, must look for work otherwise he loses his occupation. Sonic appears in the middle of the town and challenges him although Saitama is disinterested.
After Saitama's blunt disinterest in battling Sonic. He hears how Saitama has become a professional hero from his conversation with Tanktop Tiger and Sonic starts to create havoc trying to get Saitama to fight. Saitama, seeing this as an opportunity to count as a job, smacks Sonic unconscious with a single tap on Sonic's back, sending him into the pavement.
- The second round battle with Speed-o'-Sound Sonic lasted 42 Seconds.