[ Genis lets the correction and apology slide without a word like he's entirely indifferent. He feels a little bad seeing that shimmer come and go, but it's not really that important in the end. It's not until Masanosuke begins his pitch that he shows any reaction at all.

And the more Masanosuke goes on, the brighter Genis's expression becomes. His eyes light up, and he leans forward in his seat. ]

Wow, you're actually pretty good! You have a whole topic together already! [ He is so impressed; he though their class is full of idiots. ] Yeah, that sounds good. We might need to pace ourselves so it doesn't go on too long, but talking about the history of samurai could be really fun. [ Given his smile, he's already having fun. ]