A/N: This chapter contains drugging and noncon elements. I've never written anything like this before so I feel like I should say I'm not condoning or romanticizing these actions. This is fiction.
A wave of guilt and nauseating realization washed over Armin as he watched the pills dissolve into nothing... He'd been operating on autopilot, letting his emotions get the best of him as he processed the news that the love of his life was not only not with him but in love with someone else. He understood the upset, even if it would seem silly to others how deeply he felt about her. What he didn't understand was how it came to this intensity... he'd thought he'd been in love before. He'd dealt with breakups, what he thought were heartbreaks, and they all upset him, but this was something entirely different.
Armin hadn't thought twice about breaking back into her apartment. He hadn't thought twice about dropping pills into a bottle of juice that was almost empty. It was only after he'd done it that it occurred to him the gravity of his reaction. What was so wrong with him that he deemed this reasonable?
Why did something have to be wrong with him? Surely this wasn't the way he wanted to do things, but when did life ever go according to plan? Things happened and plans changed. Armin had planned on focusing mostly on his secondary education, finding a decent job and then worrying about settling down. Once his eyes landed on (Y/N) though all of that went out the door and he knew that everything would come second to her. Almost every single one of his thoughts, dreams, and goals was consumed by her since that one moment, and there was no doubt in his mind that they were meant for each other.
This wasn't the way he wanted to do things, but he was going literally insane watching her and Eren... He thought he could wait for her for forever, but would it really be so wrong if he just got a little something to hold him off? It's not like they wouldn't be together at some point. He loved her and she had to love him; two people didn't have a connection like they had and it be one-sided.
Armin sighed and placed the bottle of juice back into her fridge. He'd have to wait a bit for this to work, but god, it would be worth it.
Armin smiled. He always wanted to smile when he saw her, but tonight more so than usual. She just looked so ethereal while she slept, like an angel asleep on the clouds when she snuggled against the puffy blankets and pillows. This wasn't the first time he'd had the privilege of watching her sleep (he'd almost perfected the art of opening and closing her front door quietly enough that she didn't even stir); especially after the incident with Eren, Armin found himself wanting to have just a little time undisturbed... that and he was waiting. Finally the waiting was over though and tonight would be a night to remember.He watched her chest rise and fall steadily, and he doubted that it would change. Courtesy of the sleeping pills he'd laced a bottle of juice with and an almost empty glass on her nightstand. Honestly Armin had bought the pills on a whim, a fleeting idea that popped into his head that quickly dissipated. More than anything he wanted to be with her and he wanted them both to be awake and willing so the idea hadn't lasted long, but in that haze of misery a few days ago he'd slipped the pills into the bottle that sat in her refrigerator. Now she'd drank it.
Armin had calmed down quite considerably since that day. He didn't think it would be possible at first, but thankfully that hadn't been the case. He would've hated to have his emotions over shadow the events that would be transpire.
He sighed contently as he sat on the bed beside her, and (Y/N) didn't even stir. Gosh, she was just so oblivious, it was almost sweet how unaware she was. Even before the drugs she hadn't been nearly as careful as she should've been. Of course, growing up in a small community with a low crime rate clearly had given her an unreasonable amount of peace. But oh, Eren was there and he loved her right? He'd keep her safe. Where was Eren the loving boyfriend again? Oh, he, Jean and Connie were pulling an all-nighter tonight! But that's what Armin was there for! It was okay that she was so trusting because Armin would always be there to protect her, even when she was dating someone else. She was lucky Armin was so dedicated. She obviously wouldn't be able to comprehend that at this point but one day she'd realize that Armin always being there meant that no one with unsavory desires would ever have a chance to get too close.

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Trouble (Eren/Reader/YandereArmin)
FanfictionArmin was never one to believe in silly notions like destiny, fate or love at first sight. It just never seemed logical or even remotely possible, but he liked to think he was an open minded man. Not one to shy away from admitting he was wrong, and...