Trouble (Eren/Reader/YandereArmin)

Chapter 12

It would've been justified to be angry at Eren for being loud and inconsiderate while Armin was trying to sleep. It would've been justified to be annoyed at Eren for having sex with his girlfriend on their shared couch. There wasn't any sane reasoning though as to why Armin was mad that Eren simply had sex with his own girlfriend... but he was. It was becoming increasingly obvious that he was losing his ability to think in any sane way when it came to her.

His obsession wasn't exactly innocent. He knew that. Still he hadn't really done anything that was too crazy... he'd picked up a few things, nothing that would be missed too much or had any real value. He had a picture, but she had willingly sent it to him. So what if he said a few things about Eren that got into her head? He hadn't lied, and he insulted Eren regularly as a joke usually anyways. But this was a slippery slope and he knew it... and he was slipping.

He didn't WANT it to get this bad. He wanted her to come to him, but that just wasn't happening no matter how much he willed it to. The longer she was with Eren the worse it got for him. He knew that night he listened to them that Eren wanted HIM to feel jealous, and it worked. So damn well. Since that night he'd been constantly thinking about her, about how he could be closer to her, his next move. He knew what that next move was but it was a little scary, even for him. Like if he took the plunge he knew there wouldn't be any turning back to pretending it was a normal crush (even if he knew that wasn't what it was to start with).

It had been surprisingly straight forward to duplicate her key. He had access to her things quite regularly, and it'd only taken a few YouTube videos for the methods and one trip to the hardware store for the supplies. Then poof. Like magic he had a key to her apartment. Armin hadn't even felt that bad while he was making it, but now that he stood outside her door he hesitated. This was a crime... was he really capable of doing that?

Hey, you want anything from the store while I'm out?

I guess ask Eren too 🙄 -Armin

The messages were sent for two reasons. 1) He always took the opportunity to try and let her know he was thinking of her and wanted to give her anything and everything. 2) He was creating his alibi and reasoning for coming back late if he ever grew a pair and went inside, the store was packed sorry.

If you brought back some candy of some kind you'd be my best friend 😊 Eren says he's good –(Y/N)

Your wish is my command lol – Armin

It made him smile every time she responded, his heart skipped a beat when she did it so quickly. It's probably because it makes him feel like she's waiting to speak to him just the same as he feels about her, though deep down he knows it's probably because Eren is playing a game and she's just scrolling through social media feeds. It's insane how quickly his resolve breaks and he slots the key into the lock, quite pleased that it actually works and within a moment he's inside. It's not lost on him that he's out of place, he doesn't know how well she knows her neighbors so he's quick to get in and shut the door before someone steps into the hallway and sees his hooded figure.

After flipping on the lights he took a deep breath to calm his nerves. Once that's done he's able to take a moment to enjoy the scene before him, only a moment though because he knows he doesn't have a lot of time unfortunately. Everything he can see so far is so neat, clean and decorated nicely... it's the opposite of how Eren lives and sure it's normal for opposites to attract, but Armin knows he can appreciate how much effort she's put into this way more than Eren can.

Armin felt content with actions as he carefully roamed through (Y/N)'s home. His intentions weren't sinister. He wasn't taking anything, just looking and admiring, mapping out the details of every room. He smiled when he got to her bedroom, he couldn't resist lying on the plush comforter for just a moment. Thoughts of how cute she must've looked while she slept in the mountains of pillows and blankets swam in his head along with the fantasy of her curled up next to him... he hummed at the thought before getting up and making sure everything was back in place. He wasn't sure why he was so nervous before because this was absolutely the best. After leaving he felt like he knew her on such a deeper level: the detergent she used, the toothpaste she liked, what perfume she bought (which would come in handy because he definitely wanted a bottle for himself since his sweater no longer smelled as sweet), and where the best place a camera might be set if it came to that... he'd come back for that later though.

Hey, apparently you guys need beer too – (Y/N)

Eren leaned against the countertop while Jean rummaged through their fridge complaining about the lack of contents. "Hey! Text Armin and tell him to pick up some beer!" Jean shouted loud enough for (Y/N) to hear and he guessed she heard him when she offered him a thumbs up.

"Hey, horse-face, can I ask you something?" Eren spoke in a much quieter tone. Jean didn't answer him, but he did quirk an eyebrow up, "What do you think about (Y/N)?"

"Holy fuck Eren are you seriously already thinking about breaking up with her?" Jean's whisper was harsh in tone and it let Eren know that if it weren't for the woman being in the other room he would be yelling at him right now.

"No! It's not that I just wanna know what you think!"

"I think she's cool? I mean she's not good at CoD but she tries so there's that." Jean shrugged not really sure about what Eren wanted to hear.

"What do you think.... Armin thinks about her?" Eren almost paused before he said it. Truthfully it was starting to get a little weird in his opinion. Eren guessed no one else saw it and when Eren jokingly brought it up to (Y/N) she laughed like it was the silliest idea she'd ever heard. Maybe it was...

Jean laughed, "Oh yeah he definitely wants to fuck your girlfriend."

Perhaps Jean wasn't the best to come to... he didn't find it nearly as funny as Jean did, and he wondered if maybe he were just messing with him. They rarely had serious conversation, "Seriously man, am I crazy here?"

"Nah, I'm being serious. I mean she's cute, I get it, I would've probably gone for her too if you hadn't brought her." Jean mentioned it to Connie the other day that he thought Armin was a little too friendly, but Connie laughed him off. Clearly Eren saw it too, "But-"

"He's always jumps to do anything for her! Apparently when he's tutoring her he's super nice? He was so awful when we needed help!" Eren was careful that his girlfriend stayed oblivious to their conversation.

"And I mean we've all checked her out-"

"Obviously."

"But Armin takes it next level. I'd just watch your back when you guys break up." Jean chuckled at the scowl on Eren's face.

"Should I do anything?"

"Umm... hickey? Bang her loudly in the other room? Excessive PDA? I don't I guess you could tell him to stop eye-fucking her?" Jean didn't know if there was any real way to fix it? What could you really do? Sure it had to be insanely annoying to deal with, but at the end of the day Armin hadn't really made a move and (Y/N) wasn't thinking of him like that so..., "Ignore it? I mean it's Armin, he wouldn't do anything."

"Yeah... you're probably right."