This is entirely new territory for both of them in many ways. It is strange, and it might take a little while for them to figure it out. But they'll get there, eventually.

He scrapes nails lightly at the soft fuzz of hair at the back of Erwin's neck, nuzzles against his cheek and loses a sharp exhale when Erwin pleads and says his name like that. The sound seems to tingle all down his spine, making him shiver and something stir low in his own belly. He can feel some arousal happening, but it's easy enough to ignore in favor of Erwin pushing his barely covered cock into his hand. It's not the best angle for it, especially given the size difference between them, Levi can really only barely reach him.

"Come here," he instructs gently, voice coming out a little rougher than he expects, and guides Erwin a little closer. He'll have to arch his back to shift forward. It'd be more comfortable for them both on his back, but truthfully, Levi gets the impression that it won't take much.

After a bit, Erwin is close enough that Levi can rub his palm along his length, feel the shape of him just beneath the fabric. He swears under his breath, licks his lips, feeling his heart beating heavily. And then he slides his hand past cloth to find heated, silky skin. A thick dampness greets his palm as precome smears against his hand. It should be disgusting, but instead it's just stupidly hot, to feel physical proof of just how far gone Erwin is already.

"Fuck Erwin-" his voice is hoarse as he rubs his palm slowly along every inch he can reach, carefully wraps his fingers around thickness of him and feels a very distinct twinge between his own legs.

Levi gives a few inexperienced, but experimental tugs, careful not to be too rough.

"C'mon...Commander..."