Leyanne_

Sypnosis/Prologue 
She was born to a half-witch mother and an archmage father therefore she was blessed with a lot of mana In her body. 

When she was 8 years old, her family was killed by unknown people and she was the only one who survived, she was enraged by her parents' death so she decided to take revenge on them. 
 "Mom, Dad, Sister. I will avenge your death no matter what." One day while she was practicing magic and swords, she discovered that she had the most powerful magic, however even though she had a lot of mana, she would always get exhausted when using her magical power. And to live without starving she became the youngest assassin, the people of the Lavastian empire ordered her to kill all the traitors, and steal 5 gold every week. And one day the duke and the duchess Flowell changed her life from stealing and killing when they decided to adopt her as their daughter because the duchess could not bear a child.
After 4 years with her new family, the happy family split up.
 They died In a carriage accident but their bodies were not identified, and the emperor ordered them to investigate their deaths. Within a few weeks, there was news that they had been killed by bandits.  As her rage resurfaced at the news of her family's death and because of the one who killed them, she decided to take revenge on them. 
After two months, She went back to killing people and was called the "Dark killer" in the Cevallos empire because she was always wearing a black mask and a black cloak whenever she was on a mission. 
While she's finding the murderer of her new family and her original family, she was surrounded by the love of the male leads.
 " As I thought, this world I was living In was a world fantasy romance novel."  
when she met one of the male leads she suddenly remembers her previous life in the novel that she read on her past life before she was reincarnated. 
And the fact that she only remembers her past life when she met one of the male leads is the start of the novel called 'Flattering Blossom Fantasy Romance'.

Alternative titles/
"I'm just a extra character, so why are these male leads are obsessed with someone like me?!" 

"An extra character became a villainess"

My sypnosis isn't official yet, i still find some things to shortened it.

An Extra Character Became A Villainess

"Four years have passed—it feels like time has flown by, yet here I am, still feeling like a child. But none of that matters now. This is my chance to hunt down those who took away my loved ones.".

I was called the "Dark Killer" in the Sevalos Empire because I always wore a dark suit, mask, and black cloak.

The Sevalos Empire, the most powerful in the realm, was filled with high nobles who often held disdain for common people. They sought to remove them or send them to other countries.

Among these nobles, none were as notorious as Count Tedross. Known for his cruel reputation, he often abused servants when drunk, gambled excessively, and had numerous affairs. Despite his actions, he had a wife and an 18-year-old son who shared his vile reputation.

One day, while monitoring Count Tedross as part of my job, I overheard disturbing conversations about his misdeeds, making me even more infuriated. As I watched, I suddenly heard a scream and saw Count Tedross dragging a child by the hair out of an orphanage, with his knights seizing three other children. The girl bit his hand, and in response, he threw her to the ground with such force that she bled.

The scene drew a crowd, and as people gasped at the blood, Tedross smirked and declared, "Don't worry, this girl will be punished for biting a noble's hand." The commoners, aware of their powerless position, could do nothing but watch.

Furious, I thought, 'Count Tedross, do you think you own these people?' I calmed myself, determined to save the children. But before I could act, Tedross kicked the girl again. Unable to contain my rage, I teleported in front of him and kicked him to the ground.

"Are humans trash to you?" I demanded, still masked and cloaked. "Throwing an innocent child like that!"

Tedross, enraged, retorted, "How dare you, a commoner, interrupt!" I punched him hard, and his knights rushed to protect him.

"Do you know who I am?" Tedross sputtered, pointing at me with his ring-adorned fingers. Ignoring his threats, I used my magic to immobilize his knights, black vines holding them in place.

"Should I kill you all?" I taunted, causing them to tremble. "If you touch these people again, I'll cut off your head—or perhaps your limbs."

The knights, terrified, begged for mercy. "Fine! We won't touch them, just let us go!"

I released them, but Tedross, choking and enraged, ordered his knights to capture me. "Catch him and kill him!" he commanded, thinking it would increase his noble rank.

Selentia, the protagonist, faced the advancing knights, her anger rising. She unleashed her dark magic, causing chaos and fear among the onlookers. Recognized as the "Dark Killer," she realized too late that she had exposed herself.

Just then, the crown prince and his guards arrived, surrounding her. The prince pointed his sword at her and said, "I didn't know you caused trouble here again, Dark Killer."