Odd! I think it's suppose to be 半 (odd) rather than 丁 (even) here as it's Futo-chan that's calling out the bet. It makes no sense for the dealer/baddie to be the one calling the bet out first, and the story doesn't make sense if Futo's the one calling even here.

I knew it... The die itself was the real baddie...

Yoshika said that she smelled something delicious from the cup.

Hehehe... but take a good look! The number on top of me is even! Therefore, it's ev-...