AN/ I just got an idea... I've actually never seen a fanfiction with a plot like this so I thought "why not write this down?" and there we go. You'll get everything after reading the prologue, so I'm now stopping babbling.

Disclaimer: I do not own Durarara nor any of its characters. I own only a plot and the words I used.

Please put a black or brown under ((h/c)).

Prologue

A ((h/c)) teen girl was sitting in her place in the classroom. Her head rested on her fist and her dark eyes were staring at the blackboard as her face seemed devoid of any emotions.

She seemed to not pay any attention to the introductions of her class. But when it was her time to introduce herself, she surprisingly didn't overslept and rose up from her seat. Even if she smiled sweetly at her colleagues, her eyes remained freezing cold and her stare caused her class to shiver.

"My name's Orihara ((Name)). Nice to meet ya~" she said, already attempting to sit down, but the teacher stopped her.

"Do you have any hobbies, you'd like to share?" he asked and the girl tapped her chin in thoughts.

"Nope." she landed on her seat. The teacher let her be and focused on the next student.

At normal times, she was really a sociable and cheerful person, but today was this rare day, she was angry.

And to precise it was her own bellowed twin, older by only two minutes and forty eight seconds, who angered her this morning.

As the next row started their introductions, ((Name)) felt tapping on her shoulder. She turned around to met smiling face of her glasses-wearing friend.

"A fight with Izaya..?" he asked and the girl nodded with sad expression.

"Yep." was her response.

"Mind telling me what was it about..?" the boy continued, thinking that the older Orihara finally overdid it.

"Listen Shinra…" The girl sighed tragically. "He ate the last piece of tuna!" she exclaimed, gaining an "are you serious" stare from her friend.

"Say what!?" Shinra's eyes went to the size of small plates. The girl nodded her head with the utmost seriousness plastered over her face, as the boy asked himself what's wrong with his friends to fight over such a thing. Oh he knew what was wrong.

"But that I already forgave him." ((Name)) continued and this time Shinra sent her a blank stare.

'Cocky bastards…' he thought.

"Then why are you angry, ((Name))?" he asked, starting to get annoyed and she sent him a sad stare.

"He said, I'm heartless."

"Huh?" Shinra blinked his eyes once, twice, then scratched his neck. "Umm… You're aware that your brother's a dick… at times..?" he asked, hoping that ((Name)) didn't notice the slight pause in his statement. "..and he can say lies to only get out your reaction..?"

The ((h/c)) girl pouted.

"I know… but Iza-nii's always honest with me." she whined and Shinra sighed.

'Seriously..?' he thought. 'How's that ever possible for this bastard to not tell any lies..?' he asked himself, all this time trying to soothe the girl that unlike her human-loving brother, never cared about anyone rather than herself.

This family was sick.

AN/And there's a reason for dark hair color. And the idea of mine was of course: "why there are so many fanfictions like Izaya x Shizuo's little sister and I never came by a Shizuo x Izaya's sister?" Well… maybe there are some and I just didn't find them…