~No One's POV~
Now, this is usually the beginning of a romantic relationship, or so Bill thought. It was simple, was it not? Take the girl to a fancy restaurant, go see a movie, and surprise her with a rose, proclaiming his "love" toward her. Bill could not deny it, he did like her. But that's all he knew. Bill knew nothing of real love. It was such a foreign concept to him. It was just a simple human emotion that he had no capability of understanding, at least that was the explanation in Bill's head.
However much he loathed the male human he made a deal with, Bill did have to uphold to his word- to a point. Bill could feel the days beginning to come to an end. His grip on his host was beginning to loosen. Bill was beginning to realize he needed to get what he wanted out of (Y/N), and fast. He had spent far too much time loafing around with her. Two weeks of playing in the snow, one week of comforting her, and one last week he needed in that lab. But, strangely, Bill didn't quite want to get rid of his human body. And he surely didn't want to hand off (Y/N) to that man she was so scared of. That man was the only one willing to give his body for Bill's use, as Bill had quite forgotten that normal adults are far harder to convince that their dream is their reality than a twelve-year-old boy and a socially awkward young adult with nowhere to go.
Bill thought nothing of the deal when it was made. It was just some poor chap who was stupid enough to think a demon could get his girl back. Of course, it was rather hard to get the deal in place, as this man seemed smarter and more manipulative than most. Bill had enjoyed that in him, and had he a mechanically inclined mind, Bill would not have even needed the girl. However, cunning and deceptiveness do not always go hand in hand with intellect.
When Bill had first met (Y/N) in the woods, chasing that white stag, unknowing of it being her "ex's" symbol, Bill had felt a strange little twang in his metaphorical heart. He had just brushed it off, and didn't think about that moment until getting into (Y/N)'s truck and being reminded for the fifth time to put on that uncomfortable strap across his chest and lap. Bill simply told (Y/N) of the restaurant he wished to go to and she drove, having no idea of Bill's intentions for the end of the night. Bill looked at the rose he had placed just out of (Y/N)'s sight, it was wrapped in a type of pink flower that hung off of vines, called bleeding hearts, due to the heart shaped flowers opening slightly toward the bottom and letting the insides spill out. Those flowers were (Y/N)'s favorites.
He knew because she often had expertly taken photos of the flowers and half finished paintings of them were strewn about the room (Y/N) had let Bill stay in. Bill had no reason to read her mind for that. Bill tried not to read her mind that often anyway. He knew she didn't like it too much, and Bill didn't want to annoy her.
Bill thought to himself as the trees whizzed by the window, (Y/N)'s car being the only one on the road for the time. He thought mostly of those flowers. The ones that (Y/N) enjoyed the most. He found it rather funny, since (Y/N) loved those flowers, but wasn't connected to them like she was with the quill- however much she seemed to hate it.
Bill had been watching her before they officially "met," and he remembered seeing her stare at that quill. He was thinking of ways to get her to trust him. Or at least believe him. Maybe, if he wasn't so reluctant to meet her as he normally was, as Bill normally should be: a triangle with the ability to manipulate spacetime however he pleased, he would have gotten what he wanted much faster. Without the need of that lowlife human who was as willing and capable to destroy that girl as Bill was willing and capable to keep her safe.
Yet, that was if she kept her promise. Or... did it go deeper than that? Deeper than a simple shake of the hand and a quiet little squeak of surprise when her world was turned on its head? Deeper than the fake smiles he had gave her that slowly began to feel real? Deeper than those flowers, opening their hearts to show the world how they felt, unlocking something Bill had kept locked since the day he destroyed his home dimension.
Bill broke out of his thoughts. That was it. That was his breaking point. The demon-turned-man let out a yelp and screamed for (Y/N) to stop the car and pull over. She did and stopped at the side with the screeching of tires. The pungent smell of burning rubber burned Bill's nose, but he didn't care. He never did. Those moldy smells of the closet where (Y/N) locked away any reminder of that... monster. Not even human. Bill didn't mind. The terrible, awful stench of both he and (Y/N) after a long day of childish play in the snow. Bill paid no heed.
Bill fumbled with his seat belt and hopped out of the car, grabbing the rose and tripping over a stray branch, having him tumble down the shallow hill and land safely into the powder below. He could hear (Y/N) gasp and slam her door shut. He could hear her scramble down the slope herself, to get to him. He could hear her care.
Bill slowly got to his feet, wincing a little at the sprained ankle, but paying no attention to it. (Y/N) made her way toward him, muttering medical nonsense but stopped dead in her tracks as Bill pulled out the rose. A single bleeding heart was left on the rose, the rest ripped off their vine from the fall. However, this heart was not bleeding. It had yet to fully bloom. Bill looked (Y/N) straight in the eyes, and held the rose out delicately, the bleeding heart dangling in front of the rose.
"(Y/N)..." Bill began, feeling eons of locked up emotions flooding out and breaking his voice. "I... I was going t-to... take you out... b-but... I... you... y-you deserve better th-than some cliché of a d-date... a-and... I..." Bill looked up at (Y/N), seeing her cover her mouth in a silent gasp. So she wasn't the emotionless human he originally thought she was. "I-I... I love you..." Bill looked down to the ground, still holding the rose.
(Y/N) pulled the reddened, embarrassed man into a tight embrace, unable to say much of anything. Bill was surprised at her action, and didn't understand what it was for a split second. But soon enough he realized what was happening and hugged back, dropping the rose to the ground.
And as it fell, the bleeding heart began to bloom, and opened itself up to the world, allowing all to see what is inside. The rose landed and the bleeding heart lay on top of it. A yellow, withering rose opened its heart.

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Zigzag Logic (Bill Cipher X Reader)
Fanfiction(Y/N) is a total science nerd, skeptic, and complete disbeliever of the supernatural. She lives in Zigzag, Oregon with a miniature, one-person research facility that she runs. And after having a particularly bad experience with a former fiancé, she...