Sweet Mask vs. Fuhrer Ugly

Aren't you that idol hero "Sweet Mask"? You're the hero I hate the most. In different ways, we both make girls scream. I'm gonna kill you.

Sweet Mask vs. Fuhrer Ugly is the battle between the A-Class hero Sweet Mask and the Monster Association executive Fuhrer Ugly.

Prelude
After defeating Do-S, Sweet Mask continues to roam the Monster Association Headquarters, coming across more monsters and beheading one of them, taking its head with him.

Sweet Mask comes across a room with many tanks and hundreds of monster cells within them. The monster head explains the machine's function to Sweet Mask. The hero concludes that in order to stop the production of monster cells, he must kill Orochi, and effortlessly destroys the monster cell tanks.

He later runs into several large mirrors, which he then uses to look at himself in a narcissistic manner. While he is still looking at himself in the mirror, Fuhrer Ugly suddenly emerges behind Sweet Mask and the mirror reflects his image to Sweet Mask, causing him to be terrified by the monster's ugliness.

Battle
Sweet Mask throws the head at the mirror, shattering it into pieces and falls back. Fuhrer Ugly then approaches and kicks him through several mirrors as Sweet Mask believes that even he, the handsome, highly intelligent, mighty warrior worth a thousand men, and "perfect" hero cannot win this fight. Fuhrer Ugly identifies him as the idol "Sweet Mask", and states he is the hero he hates the most. The monster says that in different ways, both of them make the girls scream. Stating he is going to kill the hero, Fuhrer Ugly explains that looks and battle stats do not go together, and that reality is something he will carve into the precious money maker's face. He proceeds to land multiple punches on Sweet Mask, pushing him back. As Sweet Mask acknowledges Fuhrer Ugly as a powerful monster, he further realizes that Fuhrer Ugly is undoubtedly a type of Ugmon, an ugly person whose social problems cause hatred to fill their hearts until they are swallowed by darkness and turned into monsters. He also concludes that their strength after turning into monsters is influenced by the hideousness of their hearts. Sweet Mask reaffirms that this battle is unwinnable for him not only because of the monster's strength, but when the hero witnesses extreme ugliness, his entire body starts shaking and he can no longer move. As he fights the monster, Sweet Mask frantically tells Fuhrer Ugly to stay away while the cadre laughs maniacally. Sweet Mask, realizing this is a fight he cannot win, hides and calls the other heroes for assistance. Tatsumaki berates him for his lack of ability, saying that the battle plan could fail because a member was spared to rescue Sweet Mask. Tired of Tatsumaki's stubbornness, Sweet Mask asks for any other heroes to help him, asking to switch opponents because his opponent has the worst compatibility, but as he's speaking, Fuhrer Ugly finds him, resuming their fight. Later, Tatsumaki interrupts the fight by forming a psychic barrier around Sweet Mask while pulling the entire Monster Association Headquarters above ground.

Aftermath
After being saved by Tatsumaki, Sweet Mask is shaken and humiliated with how little his strength was able to do against Ugly.