I don't own Yu-Gi-Oh; a fact which seems much too obvious to mention as far as I'm concerned, but which seems to matter no end to lawyers and such.
It isn't like he hit him on the head; he'd never do that. For one thing, it's an awful lot of exertion; and for another, well, if Seto found out, let's just say he wouldn't be much fun to be around. But since he's gotten hit, somehow – Somehow that Pegasus has absolutely nothing to do with, of course; and there's certainly no evidence left to connect him to it. – and since he's walking around, all kind of dazed and sleepy looking; is there any harm in tucking him into bed, out here at the Castle? And isn't it doing him a favor to get in with him, since someone's going to have to keep an eye on him overnight?
"You don't have to do this, Pegasus." His blue eyes are a little unfocussed, and you can just see the bump, under his soft brown hair. "I can take care of myself." His voice kind of trails off, as he adds "I've been doing it for a long time now."
"Shh, never mind," undoing buttons, helping him off with his shirt. The push he gives is probably meant to shove Pegasus away, but all he does is topple himself over onto the pillow. "Here now," very helpfully taking off his pants, so he'll be more comfortable, "you just relax."
"I don't want… I don't want to relax," and there he is, all comfy against Pegasus' shoulder, with his eyes closing.
It's nice how these things work out sometimes. Here's poor Seto, with a head injury, needing help and everything; and he just happens to be right here, where there's someone who would love to take very good care of him. Almost serendipitous, you might call it. And as for Pegasus? Well you know what they say: Virtue is its own reward.