I had a dream of this while i was on holidays and it was so bizarre i thought it could actually work - and it is!
I haven't finished it yet.. i think it's going to take me a while to finish it but i'll get there. I hope you like it even though it's not finished yet! 
Fan fiction
Title: Not what you wanted
Fandom: Angel Sanctuary/Chobits
Pairing: Setsuna + Elda (Chii)
Rating: PG 13+ (not so far but it will be)
Spoilers: None
Setting: Before the events of both Chobits and Angel Sanctuary
Elda, a persocom, was given to Setsuna by his father in hopes that she could take his son's mind off his daughter. In order to pay off his debts for buying Elda from his friend, he had to take up another job and works day and night. Setsuna hardly sees him anymore but he doesn't mind. He knows that his father needs to pay of his debts, but what he doesn't know is that Elda wasn't given to him to look after, but to take his mind of his sister, Sara, whom he is in love with.
"Elda! I'm home!" Setsunna called out through the aged old house as he came through the front door.
"SE-TSU-NA!!!!" Elda cried in reply, storming out from the kitchen to greet her Setsuna.
Elda flung her arms in the air and wrapped them tightly around Setsunna's lean body. She looked up into his eyes and smiled. As for Setsunna's reply, well...
"You're -- choking -- me!" Setsunna managed to spit out.
"Oh! Sorry! I still haven't got used to my strength..." Elda apologized, untangling her arms and letting them freely drop by her side.
"It's okay Elda, you'll get used to it eventually. So what have you cooked up for dinner?" Setsunna asked as he bent down to remove his school shoes.
"Well I’m testing out this new recipe, burritos and a special sauce... it's not quite done yet so sit in the living room so I can make sure you do your homework this time!" Elda ordered.
"Elda, you know I’ll do it later!"
"Later? Do you mean before class?"
"Well...." Setsuna scratched his head in embarrassment.
"Come on, I won't serve you any lemon marange ice cream for desert if you don't get your work done!" Elda bribed.
Setsunna sighed and succumbed to Elda's bribe. She knew just how to trick him into doing things. It was coming to be a problem to Setsuna.
Elda returned to the kitchen and Setsunna dragged himself into the living room and chucked his school bag on the coffee table, then slumped down in the couch. He threw his head back so the back of his head rested on the top of the couch and he could stare up at the ceiling. Elda's cooking wafted through the cracks of the old house, slicing through the air and entering Setsuna's nose.. Elda's cooking was improving. At first she only knew the basics of living bur after living with Setsunna, she began to learn more things and grew attached to activities such as cooking and cleaning. Sometimes Setsunna think that Elda is like a housewife, cleaning, cooking, looking after the house for the husband that comes home after work, even if the husband isn't always there.
Apparently, Setsunna's father's friend found Elda in an alleyway, lying on the ground, looking like she was sleeping. He went up to her and asked if she was alright, but then he saw the pink and white ears on the side of her head that marked that of a persocom. He took her in and started her up, he even installed some software but his new girlfriend order him to part with the persocom because she though he would soon love Elda more than her. So he sold it to his good friend, who said he would put Elda to good use.
Setsunna thought at that moment, why would his father put Elda to good use, when he is always at work? How could he fulfill his promise to Elda when he is never around, and the one that steers her away from trouble is himself?
"I don't hear a pencil scribbling across paper!" Elda called loud enough for her voice to travel into the living room.
Setsuna didn't bother pointing out the fact that she couldn't possibly hear him writing from the far away, and concentrated on the fact that the girl is physic! She always catches him slacking off even when she isn't in the same room as him.
"Uh.. I'm just trying to find the stuff that's due tomorrow!" Setsunna replied, startled.
"Well do it all even if it isn't due tomorrow. I want to -- agh!!"
Setsunna leaped off the couch and screeched into the kitchen.
"What is it?!" He shouted.
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