"Oh, good." Duo watches Manabu chug the water, then hurk some of it back up on himself, and then curl in on himself. Yeah, he got that feeling.

The (probably rhetorical) question makes Duo twist his mouth in a frown, then glance back over shoulder. Looked like the coast was clear. "Here," he says, reaching a hand down onto Manabu's shoulder. Nothing felt different, but-- "Turn around. And don't break contact."

Duo steels himself to take a look at Manabu's back, and when he manages to get a glance--

"Eeuuugh." Well, there's your answer, Manabu.