Well, he certainly has been in weirder spots before.

Yuugi was friends with guys who couldn't say no to challenges. He carried grown ass men through less.

"Okay..."

First things first...clothes.

Get his belt off and take off his jacket, and... there. It at least covered his modesty. It wasn't going to prevent questions, but he could take some backstreets to prevent prying eyes...

Right?

Right.

"Here we go...oooof, you're heavier than you look."

When Kaiba awakes, he'll find himself in a strange room filled with tile as he sits in lukewarm water.

Definitely not sea water.

His cuts are cleaned, though, and seem to have been treated outside the water before he was submerged.

Everything has the vaguest smell of coconut and pineapple and the lights are dimmed, as though to simulate nighttime.

Yuugi is nowhere to be seen.