One Punch Man - Saitama Vs Genos

After Saitama and Genos had both passed the National Superhero Registry exam, they were placed last in their classes, with Genos being rank 17 in the S-Class and Saitama rank 388 in C-Class. Later, Genos thanks Saitama for accepting the request for a sparring match and asks Saitama to take it seriously. The motivation for this sparring match was to figure out the lengths Saitama's power.