One Punch: Zombie Crisis? I'm the Bald One

[Tomato's only One Punch Man fanfic + zombie novel] [Due to plot needs, the setting of the supercontinent has been changed to follow the settings of the seven continents and four oceans in the real world] When I went to the toilet, I was flushed into the sewer and traveled through time? Before Su Jin could react, he looked in the mirror and realized that he had become bald. Wait a minute, bald? Where is my hair? Wait a minute, bald? Why does it look so familiar? This face didn't even take 20 seconds to draw! Which bald guy is this? Su Jin finally discovered that he had actually traveled to the world of "One Punch Man", and his soul had become the bald devil, Teacher Saitama! What does Boros invade the earth in advance? The Deep Sea King actually turned into a dragon-level monster? Soon, Su Jin discovered that a zombie crisis actually broke out in this world! Ordinary people and heroes will be infected. This is a real disaster! As a hero driven by interest, Su Jin, who became Qi Yu, decided to end all this! This punch is unmatchable! This punch will destroy the world! This punch will let you understand what One Punch Man is! (Basically, it's a one-punch solution, no fancy fights)