[... We're gonna put a pin in that comment about "our world" and other people from it for a moment, because for Jun, the question that came before it is absolutely the one that requires the most attention first.]

Seto Kaiba, one of the richest people in Japan, and one of the most well known duelist in the world?

[This is accompanied by a look of disbelief, like he really can't believe someone felt the need to ask that question to any duelist in existence, honestly.]

I'd have to have been living under a rock my entire life to not know who he is, especially considering that he also owns my school.

[And several other reasons involving his family, but he is definitely not getting into that with a stranger.]