One-Sided is a KHR fic, one of the rare ones with a female OC. The main character is Hayato's step sister and Bianchi's little sister.

The story should be in a format similar to "In My Shadow," and mainly focus on the Future Arc.

-The initial concept is: antagonistic OC in the Future Arc

-Maria, the OC, has an inferiority complex

-Maria should be part of the Belladonna Lily, basically an assassination unit introduced in one of the KHR video games

-She's has a bit of a princess complex

-I don't know if this fic should end in a "Bad End" yet

« Beat him, with all your might.»

---

Green snapped open, letting a flicker of red flash through her irises. The girl nodded at her colleague.

"I have found them, Bligganteth-sama."

The male barely narrowed his eyes in acknowledgment. Red dashed through the forest as the Belladonna Lily neared their desired target.

---

As the second child of a mafia boss, born nearly at the same time as a mistress' child, Maria's life goal wasn't much, nor were the expectations of others toward herself.

It was easy, so long as she brought results to the Famiglia while never lingering in her half brother's shadow, everything would be alright.

Only, who made it so that her sister was a poison master and her brother a genius?

The means didn't matter, nor did the reputation she would gain. So long as she brought him to his knees she wouldn't care. So long as she honored her mother's memory by destroying that cunt's child she would breathe.

So long as Gokudera Hayato submitted to her, she wouldn't do a thing.

"Sol, La, Sol, Fa, Mi, Fa, Sol, Ré, Mi, Fa, Mi, Fa, Sol, Sol, La, Sol, Fa, Mi, Fa, Sol, Ré, Sol, Mi, Do."

She sang, her emerald-colored irises religiously following the music sheet in front of her. Her breathing was steady, perfectly matching the crotchet that set the pace of the piece. As she took a breathe, her eyes momentarily flickered to the side to meet her music teacher's scrutinizing gaze.

There was a polite smile on his lips. The man dipped his head in acknowledgment, a show of deference to camouflage his inner thoughts.

"Fantastic, nobildonna," he praised with a perfunctory clap of his hands. "To so easily breeze through your partition when you only learned the notes, I'm impressed," he glorified, his sale-smile on perfect display for her to see.

Maria managed to utter a small, polite smile, her cheeks dusted in a light pink color. She was the perfect depiction of bashfulness. Her green eyes reflected what appeared to be pride from her music teacher's compliment.

The man was more than receptive to her changes in expression. A light unnoticeably flickered through his eyes, his smile deepened before he went on with his endless compliments.

Maria maintained her previous timid attitude. She was barely two at the time, she had no interest in music— to be perfectly honest, she found the art quite boring, and if asked, she would have preferred to play with dolls or her sister.

But what to do? Mother Dearest had told her to take up music lessons and ace them all.

If Mother Dearest told her to take up music, then it was for her own good.

When Maria was five, she wasn't yet aware of the boy whose shadow she lurked in.

Thinking back on these moments in her life. The times where she would strive toward something she didn't know, she was quite dumb.

Truly, innocent and laughable.

She was pitiful.