If anybody can, it's probably him. Or at least he's one of the very limited amount of people capable of it. Levi's expression does smooth out into something more neutral after a little while, but it's still softer than usual, somehow. Perhaps it's just the lack of an actual frown that makes it look that way.

It's nice. It's good. It feels like sunshine and a bright sky with just curly wisps of clouds. Like a cozy campfire and warm tea. Like Erwin. Levi will stay still with their foreheads touching as long as Erwin wants, because he can't think of anything else that better expresses his feelings right now than this sort of a tender, accepting gesture. He's definitely not paying any attention to the number of arms involved; he's as happy as he can be, and for a little while, even that ever-present nagging in the back of his head that insists everything is about to go to shit any moment now seems to quiet down.

Yeah, Levi knows.

"Mm, night," he grumbles, already settling in comfortably against the other man again, face pressed to him. He does have both arms, and he curls one between them and wraps the other around Erwin, snuggled up close, and then his breaths even out.

Perhaps unsurprisingly, Levi actually sleeps through most of the night this time. And depending how long the trip takes, once they wake up, they'll probably get to repeat the whole ritual again. Maybe even dress up and go play some old people cruise games on one of the decks, so Erwin can win them a fancy(er) dinner in Scrabble or something.

This trip finally, finally makes him feel at ease, if just for a few days.