Summary:

Aomori, who possesses a Monster Slaying System, arrives in the world of One-Punch Man and gains the ability to enter various Dungeons. Consequently, titles such as: "Founder of the Hero Association," "Hero Rank No. 1," "The Ultimate Hottie," "Scourge of Evil," "God of Pure Love Battles," "God Slayer," "Savior," and "Lord of the Myriad Worlds" were all bestowed upon him. This is a Multiverse Crossover story, with One-Punch Man as the main world. Dungeons include: Pokémon, Demon Slayer: Kimetsu no Yaiba, Sword Art Online, Baki, Dragon Ball, Jujutsu Kaisen, Is It Wrong to Try to Pick Up Girls in a Dungeon? (DanMachi), Dragon Quest: The Adventure of Dai, Digimon, Inuyasha, Re:Zero - Starting Life in Another World, No Game No Life, Yu-Gi-Oh!, Naruto, One Piece, Bleach, Akame ga Kill!, That Time I Got Reincarnated as a Slime, So I'm a Spider, So What?, and many, many more.