"Water polo?" Hasn't he heard that before? But Tidus can't remember where, so- "He's in the water. It's an in-water game; you're underwater 'til it's over, with the team with the highest score! I know, most people can't stay under that long."

It's always the point that comes up, so he'll get it out of the way, but not with any real weariness over it. Instead, he watches Wangji read idly, or at least the pages he ends up moving between.

"This isn't from my world, but I got this old style book from my world once, so you should be able to get whatever you want too! What's the kind you read back home anyway?"

Some opera-y...texts?? That seems so like where the Wangjis come from.