King of Heroes in multiverse

Arthur was never an ordinary man, neither in this life nor the previous one. One moment he was just an unemployed, unlucky guy struggling to survive… and the next, Truck-kun sent him flying to another world, yelling: “Isekai time, bitch!” Peace is a luxury that fate never granted him. Especially when a certain genius, billionaire, playboy, and philanthropist looks at the cameras and says: “The truth is… I am Iron Man.” — Description from novelcodex.org