I've never heard of it sadly, but you said it was another dimension or something like that? I guess that makes you the Future Century to my Universal Century timeline, or something like that.

[Fortunately, Fumina was used to this response, thanks to Sekai knowing nothing about Gunpla and she pulled out her Star Winning Gundam, holding it up in all of its SD glory.]

Nope, I've never heard of Duel Monsters, but this is a Gunpla! This is my Star Winning Gundam, I built her myself! I made as many parts as I could and customized several others into a new Gunpla.

So what's Duel Monsters about? Is it a battle game like Gunpla Battle?