So, this is Dan and Blair, Eternal Sunshine of the Spotless Mind fanfiction version. Is not quite literally as the movie, but I think that some quotes that I truly enjoy in the movie, I will use them here. Basics: Why Eternal Sunshine of the Spotless Mind? Because it is my favorite Movie. Is this AU? Yes. Why are they OOC? I am trying to write them in character, if I fail terribly, I'm sorry. I don't have a beta, all mistakes are mine.

Chapter 1

She couldn't believe Humphrey would be capable of doing it. Scratch that, now that she thought about it well, that Brooklyn's Benedict Arnold was capable of anything. She was, in one word: angry; in two words: very angry. And no wonder, just yesterday she had visited Serena and Nate in search of clues on why Dan was treating her like the biggest stranger and playing ignorant on everything she was telling him when she visited him at the loft; and what was her surprise when the golden couple told her not to bother Dan anymore. Their nerve!

"But S, you can't tell me that! Is that what you told Humphrey? To ignore me completely? No wonder; he took your advice in the most exaggerating manner."

"I did no such think B, It's just… too difficult to explain." Serena tried to appease her.

"What it is too difficult to explain? Is an overestimated exposed to Nate actually affected you?"

"What does that even mean?" She could hear Nate say from behind Serena, using her kind of like a human shield, not wanting to get involved.

"Blair, calm down, we all know you left Dan for Chuck so I don't know what problem can possibly cause you not bothering him. Just let him be." Serena told her.

"Is that what you think? That I left Dan for Chuck? Why does everyone think that? It didn't happen that way!"

"Of course we think that, anyone from the outside will think you left Dan for Chuck…" Nate could say before Blair interrupted him.

"Archibald, if what you are saying is in no way whatsoever useful for the conversation, then, don't talk!" Blair raised her voice, "Now, what I want to know is what is happening exactly? What has Dan told you?"

"B, what happened between you two? We need to know, you two are our best friends." Serena asked her.

"I don't know, we got into the tiniest fight, then one thing lead to another and it got dimensional and after a few minutes I left the loft shouting things I didn't meant. Next thing I know, we're not together anymore. My pride stopped me from giving the first step. But now, I try to be the bigger person and make things work again… the problem is I can't make things work if he ignores me completely." Blair finished talking with teary eyes.

"B, I'm so sorry." Serena tried to comfort her.

"Yes, we truly are." Nate, in his own way, tried to comfort her too.

"Why are you sorry for? It's not like this has anything to do with you."

"We are…" Serena began.

"Blair, I think there is something you need to see." Nate interrupted Serena and proceeded to take a rectangular yellow paper which he handed to her and Blair read the words she swears she will never forget:

Dear Mrs. and Mr. Archibald

Daniel Randolph Humphrey has had Blair Cornelia Waldorf erased from his memory. Please never mention their relationship to him again.

Thank you.

LACUNA INC.

"What is this?" She practically shouted.

"I don't know; this place that does this thing." Nate told her.

"Nate, be more specific, what thing, what? Ugh, I can't rely in you on this, Serena, what is this?" Blair was bordering into a nerve attack.

"We don't know completely either, all we understood is that he erased you, so, you are not and were never part of his life anymore." Serena tells her.

"But… how? How is this even possible?" She tells her pointing to the yellow paper. "And is not like I've only been in Dan's life for a month or two, if he erased me this means various years, we have known each other since high school. So if he erased all of me, what does he even remember?"

"Blair, we are not scientists," Nate informs her, "All we know is that he only erased you, and only you. He has collective memories of high school, everything else. He remembers Serena and me; he just doesn't remember you."

"We really don't know. If you want to inform yourself better, contact this Lacuna Inc. thing. I'm sure they will be able to provide answers, we are just telling you to leave Dan alone."

As if she could. As if she just could let Dan be. She couldn't even sleep well on those thoughts; replaying in her mind a thousand times the conversation she had with Serena and Nate. She did follow their advice. She contacted the place that erased Dan's memory and she made damn sure they listened to her. She wanted answers and she was going to get them.

"What is this?" She asked to the doctor that was in front of her. It seemed that this question was becoming part of her everyday vocabulary rather quickly.

"You shouldn't have seen this." The doctor referred to the damn yellow paper that Blair couldn't let go off. "I apologize."

"Is this some kind of sick joke? It surely has to be, if Humphrey is doing this to 'teach me a lesson', I swear…"

"I assure you it's not a joke, or anything near that. This is a serious issue, Mr. Humphrey erased you."

"But why? Why would he do that?"

"Look, our files are confidential Miss Waldorf, so I can't show you evidence, suffice it to say that Mr. Humphrey was not happy and he wanted to move on. We provided that possibility"

He wanted to move on. He wanted to move on. The words lingered the rest of the day in her mind, permanent, almost like a scar. He wanted to move on. He was not happy.

"We provided that possibility! What the hell is that?" Blair still couldn't understand.

After visiting LACUNA, Blair went to Nate and Serena's penthouse trying to make some sense of the whole situation.

"Blair, you know Dan, he is a writer, he writes stories, fiction. He probably thought that this whole erasing process was magical or a fantasy or something he dived into not giving it that much of a thought." Serena tried to reassure her.

"A fantasy." Blair sighed. It was all Blair got from everything Serena told her. Dan erasing her was his fantasy. Oh great!

She felt pathetic really; she was currently in her bed crying over Dan Humphrey, mourning Dan Humphrey. "Why? Why? Why?" Was all she could say between sobs. This couldn't possibly be her life, she couldn't, she just couldn't live with the thought that Dan Humphrey didn't remembered her, didn't… anything. After many hours of being in this state, a thought got into her. She wanted the procedure done. She wanted to erase Dan.