[L doesn't seem like he's in any rush to escape the anchor. Shōyō has earned his right to touch him easily, and besides, he reads it as positive reinforcement that side-of-the-head-pats are desired highly and also pleasurable.]

I could... it wouldn't be my first of the evening, but I've been on guard for most of it. Now that you're here, I don't need to worry half as much about making sure I have my wits fully about me, right?

[He might mean it as a joke, but there's a slight strain around his eyes. He's been navigating this party as both more and less than a typical guest, and it shows, just a bit.]