Assassination Classroom Yandere One-shots!

You belong to me (Yandere!Male!Reader x Karma)

For usagi-shuuko )
'Awwww, how cute his smile is~', you thought to yourself as you stared at the smiling Karma. 'Did he know how adorable he was?..'
You looked around to see who or what he was smiling at.
Nagisa shiota. That bastard. No, no one would steal his karma from him. No way in hell. You got out of your seat and walked toward Nagisa and Karma.
Nagisa looked at you and smiled, "Hello (Y/N)-kun! How are you?"
You glared and grabbed a glass bottle. You smashed it on the desk and stared at him. Everyone's eyes were focused on you. You put the broken glass bottle up to his neck.
"Talk to my Karma-kun again and I'll kill you, got it?"
With that said, you held Karma close. Who jolted in your grasp. Nagisa got up and ran away. Everyone else stared at you in horror. You smiled as you sniffed Karma's hair. "You smell like strawberries, Karma-kun." He jolted and squrimed, trying to get away from you. But you're hold only tightened until he stopped struggling.
"Don't think you can run from me, Karma-kun..", you whispered in his ear. You could sense him looking around for any source of help.
"Tsk tsk tsk, bad little Karma-Kun, do I need to punish you?~" with that, he gasped and stopped what he was doing. You smiled. Your eyes had lost all sanity.
"You belong to me now, Karma-Kun.." And with that, you laughed. Laughed and laughed. Laughed til you were out of breath, but once you regained it, you laughed again. You saw that Karma looked uncomfortable.
"Awwww Karma-kun~, are you scared of me?" You said, your tone getting darker and darker as you started getting angry. "No! No! Not at all!", he hesitated. "Good, because if you were, I'd have to kill everyone you love. And if you don't accept me after that, I'd have to kill you too. Heheheh~," his eyes widened.
"(Y/N)-kun, don't you think you are being a bit...crazy?..", you turned and looked at the source of the voice. Itona Horibe. You let go of Karma and walked up to him. You punched him square in the face. He gasped and fell. His nose bled like a waterfall. You chuckled and went back to Karma. You wrapped your arms around him yet again.
"You belong to me.."