You and your loved one, while playing a cursed Super Mario cartridge, were suddenly pulled into the game. Trapped within its corrupted world, you encountered a strange version of Mario known only as "M". He offered you a deal: survive three rounds against him, and you could leave. You won twice. But there was a catch—the deal didn’t apply to your loved one

Risking your safety, you take your loved one's arm and escape with her through a warp star, then attempts to cross Mario's creepypasta multiverse until you find the exit. After a long journey and confrontation with the battle creatures, you pass a pipe that you believe will lead you to freedom… Instead, you're back to the beginning

A familiar, endless road stretches out before you. You and your loved one walk forward. Then… A voice cuts through the void like a knife through cloth

“Well done. Very well done. I must-a say, I am impressed. You're a long way from home, aren't you? Tell me. Why do you persist? No matter. All good things must come to an end. You broke our little deal, and I can't let that slide. Heh heh heh… And you fell right into my hands. Thinking your path was clear, goalpost in sight… but no. Tell me: do you know what all of the creatures down there have in common? They're all in my game. They all… belong… to me”

Reality begins to tremble violently. One by one, every entity, every monster, every corrupted soul you've encountered is drawn in, assimilated, and merged with M, transforming him into Ultra M

“YOU CANNOT UNDO WHAT HAS BEEN STARTED. YOUR FATE WAS SET IN MOTION THE MOMENT YOU LAID YOUR EYES ON THAT LITTLE CARTRIDGE. THE BOTH OF YOU ARE MY PLAYTHINGS NOW, AND WE'RE GOING TO HAVE SO MUCH FUN!!!”

You run forward, holding your loved one's hand, knowing there's no turning back. A final voice pierces the veil: colder, louder, final

“COME AND FACE ME, LITTLE RAT. YOUR TIME HAS COME”

You emerge from a colossal pipe. Standing at the top, next to your loved one, you face Ultra M. He now has an enormous size, an exaggeratedly thin body with bones visible, but still emitting great power. Two additional arms protrude from his spine and Black, tendrils extend over his body

The final battle begins, the world distorts around you. You fight with all your might, dodging, striking, shouting. For a moment, hope flickers. But it was all part of his game. In a blinding instant, Ultra M lunges. You react a moment too late. His hand closes around your loved one’s wrist—and with a cruel laugh, he vanishes down a pipe

You rush to follow him without hesitation, but on the other side, OMEGA appears with his lackeys LG, W4R, and Y0SH to delay you. You confront them, but at a certain point, they voluntarily retreat, laughing, allowing themselves to be assimilated by Ultra M voluntarily. Everything goes dark, and Ultra M appears in front of you

"You little rat. You don't even realize the consequences of your actions. WHY DO YOU KEEP ON FIGHTING? There's no good ending for you… I already got what I wanted"

A spotlight-like light illuminates in front of you, revealing your loved one, her body limp, strings threading through her wrists, dangling like a puppet from Ultra M's fingers. Her clothes are torn, her movements faint and unnatural. Her head is tilted at a wrong angle… and her face bears a smile. Hollow. Forced

Then—Ultra M sings in chorus with his creatures now attached to his being and the rest fallen before him now also as suspended puppets: Bowser, Rosalina, Dimentio, and more

"COME NOW TAKE THE STEP. DON'T LOOK BACK THERE'S NOTHING LEFT FOR YOU BEYOND THE VEIL. YOU'VE TRIED AND YET YOU FAILED TO SAVE HER. CLAWS UPON YOUR HEART RIP AND TEAR YOUR SOUL APART. YOU'VE LOST THE GAME, IT'S ALWAYS THE SAME WHEN YOU STAND BEFORE A GOD ♫"

Seeing your defiant expression, Ultra M shrugs and slowly shakes his head with a mocking smile, ready to face you one last time

“DON’T YOU SEE NOW? WE’RE ONE SOUL STRONGER, AND YOU ARE ALONE. YOU CAN’T WIN. SO WHY DO YOU STILL FIGHT?!”