A/n: smot smut

"Eren?~ Oh!" Levi stops at the bottom of the stairs, as his lust filled eyes land on Eren, dressed in lacy and dark stockings strapped to a garter belt as Eren sat frozen on the bed.
"Uh? Happy rut day?" Eren replies awkwardly, his cheeks turn beet red. Levi smirks as he walks over to Eren.
"My my, Mon amour~ tell me what such occasions is this?~"Levi smirks as he pushes Eren onto the bed, climbing over him. Eren can feel Levi practically purring as he gazes over him.
"Oh, uh... well, I heard your rut would most likely occur today, so I had asked your mom if she could by me some.. lingerie to make it more special. I just wanted to make this rut a little special because its the first one we spend together." Eren nervously explains, looking away as he feels mass amounts of embarrassment and shame. Levi chuckles as he rubs his crotch over Eren's.
"Mon amour! My rut is already special enough because I get to spend it with you~ do you even know how long I've wanted you like this?~ Why, ever since we met I've been wanting mark and bond every inch of your smooth skin~ but I'm not complaining," Levi purrs as his nose presses against Eren's,"I already know that I'm enjoying this far more than any other fantasy I've had~" Levi catches Eren off guard by plunging him into a deep kiss. My kisses back,Trying to be just as fierce. Until Levi slams his hips down against Eren's, causing Eren to moan in the kiss as Levi's hands travel all over Eren's skin.  Eren lets hos inner omega take control as Levi eventually breaks the kiss as he pulls away.
"Oh god mon amour, i sure hope you know what you're getting into~" Eren's arms wrap around Levi's neck as he goves his alpha a small smirk.
"Hm, I'm not sure. How about you give me a taste~" Eren whispers, seductively as he bares his neck. Levi has never smirked  so damn hard, he quickly buries his head in Eren's neck. Eren moans as Levi covers every damn inch of his neck in bites. He presses the alpha closer as his nose is filled with the scent of his alpha's arousal. The more Eren breathes if n the hornier he becomes, the more pleasure he gains just by touching his alpha.
"Oh god! Levi~ yes!~" Eren moans. Losing all thought of shame and embarrassment. Levi ruts his clothed dick against Eren's as he groans.
Eventually he pulls away to look at his little omega.
"My my, someone sure is eager~ look at such a beautiful mess you are~ God I don't know how much longer I can resit you~" Levi chuckles.
"Then don't~" Eren bites his lip.
Levi pauses for a moment, seemingly taken a back by Eren's words. His eyes stare widely into Eren's, tinted with lust and shock. It isn't long before he grabs Eren's lacy panties and tears them impatiently, ripping them off of the very shocked and aroused Omega below him.
"Oh fuck Levi!~" Eren moans as Levi quickly moves his fingers to Eren's hole. Quickly a finger fills his empty and leaking hole.
"Ah! Shit! Levi!~" Eren moans, his inner omega truly enjoying the attention his alpha provides. Levi trails his mouth over Eren's collar as he bites his mate, while moving the finger inside of the omega. Eren pushes back against the finger as he moans.
"Oh god Levi! More please! Aah~" Eren moans as Levi adds another finger. He pulls up from Eren's spotted collarbone to take in the sight for himself. Eren's eyes shine with both lust and pleasure as he thrust harder and harder into the omega beneath him wailing in pleasure as he hits the right spot. Eren clings onto him in desperation.
"Oh my god Levi please!" Eren cries as Levi shoves another finger into his omega.
"Shot, you're so damn wet. i could probably shove my entire cock in right now and meet little to no resistance~ But I don't want you to hurt my love~" Levi caresses Eren's cheeks, to his ears, and to the back of his head.
"Oh! Levi! Please ! Please please please please please! I need your thick cock inside of me! I wanna feel your seed fill my womb! Oh god please lev-Ah!" Eren screams in pleasure as he feels another finger added.
"If you keep talking like that I might just tear off my uniform and fuck you right here right now~ go on mon amour, tell  me how much you want me ~" Levi's alpha purrs in amusement, watching his omega begging for him, to be fucked by him, to be impregnated by him. It was to much. Eren cries as his prostate is pounded by the alpha above him.
"Hm~ Levi! Oh god please! Shove your thick juicy cock inside me! Fuck me until I'm pregnant! Just please Fuck me! Fill my womb with your seed! Just Fuck me already!" Eren cries as Levi's fingers pounds his prostate faster, leaving the omega squirming in the alpha hold as he drown in pleasure. His stomach is coiling with each and every thrust..
"God fuck! Levi-ah! Please just shove your cock in me! I wanna cum with you inside of me! I want to cum as you fill me up! Please just sto-aaah! Eren is cut off by his own release. Spilling all over the lower half of Levi's body, getting all over his uniform.
"Its okay my omega," Levi whispers, pulling his fingers out leaving Eren empty and whimpering,"I'm going to make you cum until either my balls are empty, or until you pass out~ even then I might not stop~" Eren moans at Levi's words. He help Levi remove his uniform quickly. Throwing his shirt somewhere. Eren can help but feel like a sack of jello, letting Levi play with him all he wants, repositioning him so he is on his side, a leg over Levi's shoulder, as the alpha rubs the head of his cock over his hole.
"Levi~ Ah! Levi!" Eren moans as Levi sunk fully in with one thrust. Eren can't help but smile widely as Levi fills him so perfectly.
"Oh god Eren! You're so tight around me. I can't wait to fuck you loose." Levi teases.
"Shit! Just move already!" Eren begs. Levi smirks, as he proceeds to fuck his omega.
..
Eren lays next to Levi in their bed. Levi was fast asleep after 4 rounds. Eren wept as he faced away, guilt overwhelming him even more. How could he do this? Eren hopes to find escape in his memories.
A/N: smut was too long and i got lazy to be continued

Btw we finally get to see someone very important in the next chapter