This story isn't mine, it is kaiserofdarkness' story. What I have done is translated it from Spanish to English.

~Prologue~

~Obsessions can become dangerous, but maybe, just maybe they could lead you to what you really need.~

Academy City as everyone knows and as its name implies, is home to hundreds of campuses for education and knowledge, one of them which is among the most renowned is undoubtedly Tokiwadai Academy or in this case it's middle school campus, where we can find personalities like two certain level 5s of Academy City, among many others, this time we will focus on a certain level 4 girl who possesses the esper ability 'teleport' and who is in love, and lives,with her roommate and senpai, Shirai Kuroko.

"Ahh…" Kuroko sighed as she read a girl's magazine on her bed with some sadness. "Why can't I find anything here that will help me with my onee-sama?" She said as she flipped through the pages and briefly read the articles. "I think it was a bad investment to buy all the possible magazines on impulse… How to have lighter skin? How to make your hips grow? How to highlight a small chest?" She said to herself as she passed through the magazine articles without emotion.

Though that last article might be of use to Mikoto, Shirai knew that if she told her that directly, she would possibly try to fry her.

"Damn... because I thought that buying this girls magazine would be useful to me just because I heard those high school girls in the store…" But suddenly while she was reading. "How to make your partner jealous to get their attention?" At these words an unusual shine could be seen in her eyes. "Let's see…" She said while she read the article in detail.

"Whether your partner or someone with whom you want to start a relationship is not very attentive to you these days, try making her jealous, go out with other friends of the opposite gender that you have in common and that way she will seek to stand out…"

"Warning: This same advice can be used to find out if your partner is possessive or even toxic."

"Make onee-sama jealous with someone we share a common friendship with?" She became thoughtful and after a few seconds she sighed. "I suppose that when specifying that they need the person to be the opposite gender I will have to discard Saten and Uiharu..." After a few seconds she had a frown on her face. "This is nonsense... after all... apart from that ape that onee-sama and I know, is there any other boy we both share a friendship with?" She got a little annoyed when she realized the answer. "I've only seen onee-sama with that damn ape and although I was saved by him in the incident with that redhead teleporter, I don't think he would even help me even if I asked…" she got up and went to the door. "Although who knows... maybe he may want to help a young woman find the love of her beloved onee-sama if I ask nicely" she said while she stroked the metal rods on the ribbon of her right leg. "It will be better to verify it once.," she said, taking out her cell phone.

Then Shirai Kuroko had disappeared, she went in search of the boy, to her annoyance the search for information about the ape's address had taken almost two hours, until finally the figure of the girl was visible arriving at the apartment building of a certain high school boy in question.

"I must admit that it was very strange how long it took you to find this address Uiharu..." said the girl with the pigtails with some doubt with the phone in hand as she went to the front of a certain room of the men's department according to the data that her screen was showing her. "Are you sure this is the place?" She said with some doubt when she saw the basic facilities in which she was at.

"Well, it was difficult to get the information..." Kazari revealed on the phone. "It was not in the official records or anything, I tried to obtain a record of the boy by superficial means and it did not work but after triangulating the information a bit and finding a publication of a suspect belonging to the church of the brown bear, where it also mentioned a siscon sergeant and showed a picture of the Delta Force leader is the best clue we got..." she said with some confidence in her words.

"Is that boy part of Skill Out?" Kuroko said, confused. "I didn't expect onee-sama to have contact with someone like that and regarding the Delta Force... Why does that name sound familiar to me?" She said to herself.

"It was one of the most dangerous gangs a few months ago that operated in the area although their activities suddenly ceased... according to their report they were boys who provoke fights and... the leader had the habit of kidnapping women from the veil of the night to turn them into his pets?" Exclaimed the girl with the flowered crown, extremely impressed, while reading the file she had found.

"Well... if that is the case, it will be good to inquire about that issue..." Kuroko said as she approached the elevator of the building, but just when she had reached the floor and left through the elevator door.

"Gya! Fukou-da!" A heartrending scream could be heard throughout the entire building.

Kuroko by mere instinct was on guard and then.

"Ahmm... ahhh... damn... this time I surely thought that this was the end of this poor Kamijou Touma..." They were the words of a certain young man with spiky hair who had suddenly left his apartment and knocked on the door next to his. "Tsuchimikado! Go out eat for what you want the most! Index discovered I went with you to the barbecue and she is so upset that she sank her teeth into me deeper than before!" The boy kept pounding in front of his neighbor's door without getting a response.

For her part Kuroko chose to get closer to see what she could hear.

"Damn... I don't think he's here... let's see…" Touma for his part chose to call his friend's cell phone. "Come on... come on…" he exclaimed towards the phone.

"Sorry, the number you dialed is not available for the lucky ones who keep a loli with erotic nun cosplay in their room to fulfill their sexual fetishes, nya!" said a peculiar voice from the other end of thr phone.

"What the hell do you think Index is stupid!?" He exclaimed, extremely annoyed.

"Well, well, well… a Loli in an erotic outfit is kept in your room to satisfy your sexual needs, huh?" Shirai said behind Kamijou with her steel rods in her fingers.

With this twist he could only say his typical phrase.

"Fukou-da…"