Derek winces and looks up at the sun, squinting against the glare before looking at Thomas again. He's a little out of focus for half a second, but then his vision readjusts. Derek can't help but to drift closer to him, reaching out to press a fingertip to the top of Thomas' shoulder where it's barely peeking out of the water.

"You may get a little pink here, but you're not going to burn up," Derek tells him, and then gives him a knowing, almost shy smile. "I've always been more of a fan of the moon anyway."