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5×2: You Do The Math

Summary:

It had been as planned and calculated as it could get, and yet the two red lines appeared as a surprise.
Doctor visits, mood swings, and all sorts of cravings; through it all, Levi and Erwin, soon-to-be first-time parents, do their best to prepare for the new member of the family.

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A 5+1 fic following Levi during his first pregnancy.
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Notes:

Chapter 1: 3 days

Notes:

Woah! New Mpreg fic be upon you and Happy Labour Day to all of you from the USA! (this was totally posted on Sept 1st, 2025)

Before letting you enjoy the fic, I want to thank @IceQue3n not only for making art for every chapter of this fic but for looking over this story since its brainstorming stage and giving me such enthusiastic support and guidance every time I showed him a new chapter. Even if it didn't sound like it at times through all my complaining, working on this story with you during the last 5 months has been beyond lovely <3

Compulsory disclaimer:
I've never been pregnant! and it shows!! (again)!!!

(See the end of the chapter for more notes.)

Chapter Text

3 days

That’s how long it took for Erwin to pull him into his arms, sway him from side to side, a poor mimic of dancing, in the middle of their hallway while peppering kisses all over his face.

3 days and 5 hours, more precisely

Erwin gently guided them both to their room. Levi let himself be manhandled with affection; in these last three days, Erwin had shown that there was love to spare and that Levi and the life he carried were the sole recipients of it.

3 days, 5 hours and 12 minutes, exactly.

Levi looked at his husband with nothing short of amusement as he watched him rummage through his own bedside drawers.

“What are you looking for?” he dared to ask, standing awkwardly in the middle of their bedroom, right where Erwin had told him to wait.

He got his answer when Erwin turned around, fist held up and the end of a strip of fabric hanging from it. 

Levi observed with impassive curiosity as Erwin dropped to his knees as soon as he got close to him with a less than gracious thud, big hands bringing him closer by the hips; the action steered his mind down the memory lane of more than passionate encounters. Erwin, unfaltering bright smile on his face, almost looked like a kid with how excitement seemed to pour out of those eyes. 

“Lift your t-shirt, love,” his husband said softly, just a notch away from a whisper. 

 It was only when Erwin started to circle his middle section with the strip that he understood what it was and what was happening. It wasn’t just a random strip of fabric, it was Levi’s tailor tape. His heart did a little skip, his hands coiled tightly into fists at his sides, and his cheeks flushed red in unfiltered embarrassment.

Erwin secured the tape right over his navel and finally looked up at him, chin resting against his bare hipbone.

Levi didn’t have the heart to say anything mean to those eyes.

So, he turned his head away, catching their reflection in the mirror across the room and mumbled, “You’re being silly… It's been only three days.”

He felt Erwin’s lips press a kiss to his naked skin, right over the bone.

“Three days since we found out. You could be carrying small for all we know,” Erwin placed another kiss, now on his still flat abdomen and rested his cheek against it. “I wonder just how big you’ll get,” he spoke so quietly it would’ve been easy to miss had Levi made a sound. Erwin closed his eyes as though focusing on something. And as the other sighed as quietly as possible, Levi realised that he was listening for anything.  

Levi flushed even brighter, the words caught in his throat; all he could do then was raise his arms and hug Erwin’s head closer to him.

“Fucking weirdo,” he said lovingly as he rocked them from side to side gently, his fingers delicately treading through the blond hair. “For a moment there I thought I was getting head.”

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Art by @Ic3-que3n on Bluesky

 

Notes:

Hello <3

Welcome to my first multi-chapter Eruri fic. It's a really small thing, itty bitty just like Levi, but I've enjoyed working on it and I'm proud of some bits here and there; so I hope you liked this first chapter enough to stick with these two losers until the end. For now, the intention is to post on a weekly basis, every Monday if everything works out alright. (I'm going to gaslight you into thinking I posted this on September 1st, you've been warned).
This is the shortest chapter by way, things just kept getting out of hand lol.

I'll say it again in case you skipped the first note: we all have to thank @IceQue3n for the absolutely beautiful art and his help throughout the brainstorming and writing process; without him, I think this fic would have taken another year to finish, if at all. Kal, thank you for the help with the clever fic title, even when both of our brains were fried and no amount of ABBA song lyrics could put it together. <3

If you ever want to chat about aot, eruri or the veterans, you can find me on tumblr as @kyoupann @SnKyou or @kyoupann on bsky!! <3 k'byeee thanks for reading!!!