Killer x Killer Fem Reader

Nightmare had allowed Y/n join him and the other evil Sanses because of her LV and ways she commits murder. He, Sf,Fell,Horror,Dust and Error noticed that on tv more murders were happening but what they didn't know was that Killer was being controlled by his girlfriend Y/n, until they eavesdropped on their conversation hearing Killer ask  "Will you be there watching sweetheart?" "Yes, but they won't see me until it's their time, which is when my song will play (the song on the top is the song that plays when Y/n is near with Killer) following them to a house to hear a song playing looking they saw Y/n behind Killer as they heard her whisper to him "Kill them Killer, kill them all and let me help" nodding to his girlfriend's request he summoned bones and killed her parents for what they did to her and let her kill her siblings that hurt her as well. Y/n smiled and wrapped her arms around Killer's neck kissing him, he kissed back pulling away. Y/n giggled as Killer picked her up taking her back to the castle they all ate together. Y/n had changed her clothes before she ate Nightmare mentioned it while eating "So you're a psychopath like Killer, huh?" a shadow covered Y/n's face that's when Killer asked "Sweetheart what about them?" "They know" "Let them live, besides they won't tell on me" smirking Y/n kissed Killer again he kissed back and hugged her tightly making her smile. Killer laughed as she tickled him enjoying his laughter, wanting to hear more of it, Y/n tickled Killer more making his laughter increase as he was about to fall off the couch, Y/n caught him in her arms making him blush and smile.

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