Yandere!Under verse x Reader

The Apple Incident

A/n: about two-ish m months later

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About two months later and Y/n has bonded with the brothers more and slowly getting the hang of their powers, even if they don't want to use them. They just want to play with Dream in the flower fields or read with Nightmare, but they guess it's forr the better that they learn how to use their powers. At the current moment, Y/n is curled up in a ball, leaning on Dream and sleeping while both brothers keep a keen eye on them. While Nightmare hates telling Dream anything about the villagers, he told a half-truth, telling him that a villager scared Y/n and that's how their powers activated. He didn't say that he got hurt of course. That information wasn't important right now...

Dream, glancing at Nightmare: hey, brother?

Nightmare: hm?

Dream: where do you think Y/n cam from?

Nightmare blinks in surprise and sets his book down on his lap, looking at Dream in confusion.

Nightmare: what brought this up brother?

Dream, smiling nervously: W-well, we both saw them come out of that snowflake, so they had to come from somewhere, right?

Nightmare hums in thought and nods.

Nightmare: It's entirely possible, but we don't know now do we?

Dream, shaking his head: no, just curious....

Nightmare, nodding: nothing wrong with that

Dream nods and Nightmare goes back to his book, but now unable to concentrate. As much as he won't like to admit it, Dream had a point. Where did she come from? She exited the snowflake, so wouldn't it have an entrance point as well? How odd...how odd indeed...

~~timeskip of 3 months~~

Y/n has gotten the hang of their powers more, and they are now 4! They still don't understand a lot of things, like why the villagers are mean to her brothers, but they are trying to make sure her brothers are happy...Y/n did see both of their memories accidentally and cried for a night, with both of them trying to calm her down. At the current moment, Y/n is in the tree, asleep and unaware of the trauma that's about to happen because of her brothers and their differences.

Nightmare looks up at the tree of emotions, unable to shake himself out of his thoughts.

Nightmare: my apples are just as good...so why does no one like them....even Y/n doesn't eat them...

???: you also told her not to in case something bad happened, Nightmare~ Let's not forget that....

Nightmare: shut up you parasite...

???: make me...you know you can't

Nightmare doesn't have a rebuttal for that as his fists clench and his eyes shadow. He shakes slightly, his own negative feelings getting the better of him and about to make him do something impulsive, rash, and something with consequences that no one will be able to go back from.

Nightmare: I-I...my apples are good too and Dream isn't even here! He's off galavanting with the villagers! He doesn't care about me or Y/n! IF he did, then he'd still be here! Helping me with them and taking care of the tree! The tree has mother's spirit inside of it, and he doesn't help me take care of her! Maybe...maybe I can prove I'm just as good as Dream and the villagers won't hate me anymore or be scared of negativity!...all I'd have to do is hold one of his apples. That'll prove I'm just as good as him!

Nightmare steps towards the tree and starts to climb it, as a villager approaches. Y/n is none the wiser as they keep sleeping, using their wings as a blanket. Nightmare grabs one of the golden apples and hops down. Nightmare laughs softly in disbelief.