Charming Little Sister - (Diabolik Lovers x Reader)

Chapter 20: My Light, Their Darkness

A.n. heeeey, it's been a year! H-how are you guys? Haha... truth be told, i wrote this while I was (and still am) sick, so it may get edited later! I just wanted to get something out though. Happy belated new year everyone! (10/5/2002 publish was a slight edit, apologies if you thought it was an update. But I am working on the new chapters currently)

As you crumbled in his arms, Reiji muttered little, sweet whispers into your ears, like, "Don't worry, my charming little sister, this is nothing," or "I'm here. I can take the pain away," etc. You were conscious enough now to understand, and it made you feel absolutely and totally sick. He used you as his lab rat once again, with you entirely at his mercy.

You didn't want to be near him. You didn't want to hear him. You didn't want to see him. You choked out more violent sobs, because you hated how you also didn't wish to leave his arms and embrace, because you actually felt more secure with having someone comfort you, even if that someone was the reason you felt this way.

You began to stutter out unintelligible sentences, Reiji picking up on you trying to form your words as if he were a parent detecting their infant's speech patterns. Softly, he grasped your chin to turn your face towards him. As a sadist, he was pleased with how red and puffy your eyes were. Yet as your elder brother, no matter how strict he was with you or treated you as his experiment, he loved you in his own sick way. His other gloved finger wiped your tears away, and you didn't protest.

"I'm sorry as well, [Y/n]," Reiji earnestly apologized, looking deeply into your eyes with a solemn expression on his countenance. You gasped out, trying to breathe from the crying, but also out of shock. Reiji? Apologizing?

"...W-What for?" You stumbled out, and doubted that he was apologizing for his experimentation on you, but you intently listened regardless.

"For the effects of this potion. I did not expect for you to have such an outburst. So, you have my sincerest apologies. I'll correct the formula for next time," He explained. Next time? And didn't he want to punish you? Weren't you supposed to feel pain of some sort as part of your punishment?

You choked out a simple, "Why?"

He shook his head, giving you a silent answer.

You pressed on, your tears fading away from the rims of your eyes. Your eyebrows furrowed as your clutched the fabric of the man's shirt, anger welling up inside you, asking more firmly, "Why?"

His hands removed themselves from your face as you became more heated, and gave you an eerie smirk, "Simply put, [Y/n], you don't need to know why. I have my reasons."

It began to dawn on you that, unfortunately, the memories of your mother was your punishment. The more her honeyed voice echoed in your head, the more enraged you became. Furthermore, it made you fume to not know what he was planning. Without a single moment's hesitation or a second thought, you spat out, "Fuck you, Reiji." Of course, you likely shouldn't have, given the extremely close proximity you two shared.

He wiped your saliva off of his glasses with his glove, staring you down, "Pardon me? Do repeat yourself."

You couldn't. You froze up, and he chuckled at this. He let you go, out of his embrace, and allowed you to rush out of his study, glaring at your back with a sadistic smirk. You were such a defiant young lady, and a curious one at that. From Reiji's perspective, that's a troublesome combination, especially coming from his little sister. You. Oh, how he reveled in it.

It made you sick to your stomach as you ran out, as far from his study as the mansion would allow you. He studied your running form, sighing to himself, "Honestly... You're such a handful," Yet even then, he couldn't hide his growing grin as he thought of his next plans for you. Oh, he could barely contain his excitement.