Eren tensed up so much he felt his knuckles pop. Levi slowly moved forward, Eren felt the length push closer. The it laid flat against his hole. Eren opened his eyes and looked up at Levi, whose eyes where closed in of pushing in Levi passed over it, just grinding slowly between Eren's cheeks. Levi groped at Eren's hand next to his arm, and ended up lacing their finger together. Eren watched, surprised.
Levi gentle thrust up against Eren. For some reason Levi's mind was somewhere else.
"You're so, ngh, beautiful." Levi chanted, Eren blushed harder, burring his face in his hands. Levi lapped at Eren's nape, "Prepare yourself." He mumbled, behind a mouthful of Eren's shirt, clenched between his fangs.
"No don't-!" Levi moved his hips back and then forward, inching in. Eren gaped, pain radiating through him, Levi's fingers tightened around his own. "Stop! Please!" Eren felt like he was being torn in two.
Levi inhaled Eren's musk, through his nose, but he complied. Even as his mind swirled with fog, he waiting for Eren to stop shaking, and circled his hips, grinding his teeth down into the fabric of Eren's shirt. The brunette, took ragged breaths, and felt the insistent prod of the other at his back. Eren begrudgingly relaxed a little, and Levi slipped inside. Eren all but screamed, he shuddered. Levi wasted no time thrusting up into Eren's tight heat. Now that he was in he never wanted to leave, because God Eren felt like everything he wanted.
Said brunette was shaking his mouth open, raw moans falling out of his lips. Levi slipped further into his tight ring of muscle, his hips napping against the smaller boy's, Knuckles white as he held onto Eren's hand like a life preserver.
He was drowning in shallow waters, trying to keep his wits about him, but he couldn't hold it his tail puffed up, his claws scraping the cement below. He let out hot puff through his teeth, and Eren's body met his thrusts halfway, his hips stuttering.
"L-Levi!" Eren cried, The werewolf was so close he lost rhythm, pounding into the hot tight heat, he slammed back into Eren's prostate as he came, snarling into Eren's ear, fisting his claws in Eren's hair, Adan yanking his head back.
"Ah!" Eren screamed, cumming despite himself. His eyes where wide as he tried to regain even breathing, his mouth still stuck in a scream, a train of saliva pooling beneath him.
Levi let out a breath he didn't know he was holding, and dropped his head onto Eren's shoulder, mumbling something.
"W-what?" Eren said, voice cracking and raw. He watched Levi's tail swing back and forth behind him, they where obviously stuck together, until Levi's knot went down. He jumped with the frazzled tail brushed his thigh.
"m' so sorry."