I’m the Mastermind Behind the Scenes in Yu-Gi-Oh!

After transmigrating into the Yu-Gi-Oh! world, he not only fails to become one of the protagonists whose names start with Yu, he accidentally becomes the mastermind behind the scenes?

"That man... We can't let our guard down!"

"Was even this part of your plan!?"

"In the end, you've been manipulating us all along!?"

"For the future of this world, I have to defeat you! Duel!"

Protagonist: ???

I just wanted to be a good person, okay!?