Naruto: The Outsider's Resolve - Chapter 1.6 (016):

Freyah Lima knew death all too well, but waking up five hours before the apocalypse gave her a second chance. Armed with memories of the past, she races against time to prepare. Yet, when she reaches her parking lot, she finds something-or someone-that shouldn't exist.A man stands there: silver hair, ragged clothes, and a translucent screen hovering above his head.[Florence PlaridelRole: Third Male Lead of the Novel PrimroseAbility: Healing and SwordmanshipFate: Unknown]Florence Plaridel-the half blood third prince, the unrequited lover, a skilled healer and swordsman from the last novel Freyah read before her death. In Primrose, he managed to escape before his execution due to treason, then said his farewell to the female lead, telling her he won't bother her anymore. After that, nothing was mentioned anymore about him.But now he's here. In her world. On the eve of its destruction.Freyah doesn't know how or why a fictional character has appeared, but one thing is certain: the apocalypse will rewrite the world, and Florence's unexplained presence could change everything.As survival becomes a race against fate, Freyah must decide: is Florence the key to saving this world, or a sign that its ending has already begun?The forgotten prince has returned-and with him, the rules of fate are no longer absolute.

Corporate slave Alexander dies with only one regret—not finishing the fantasy novel in his hands. Fate has a twisted sense of humor when he awakens as Alexander Flamingo, the perverted villain destined to be expelled and killed in that very story!Armed with complete knowledge of the original plot and a mischievous “Harem King System,” Alexander plans to rewrite his fate. No longer the one-dimensional pervert of the novel, he'll use his future knowledge to manipulate heroes, seduce heroines, and rise from disposable villain to the true mastermind of this world.The system grants him power through every relationship he builds—but can this calculating reincarnator use his second chance to avoid his predetermined death and become the ultimate Harem King? One thing's certain: this story won't follow the original script.

Chen Sha came to a world of immortal martial arts and was ordered to take charge of the world’s first sect.

Before his death, the previous chief told him:

“If you don’t become the best in the world for one day, you are not allowed to go down the mountain for one day.”

So he closed himself in painstakingly, crossed the heaven gate in his body, and faced off against the ancient and modern powerhouses…

…

Many years later, Chen Sha recalled the day he went down the mountain,

From the moment he descended the mountain, he was number one in the world.

In the next ten epochs, any gods and demons have returned, immortals and Buddhas have lived in the world, ancient powers and ancient gods have appeared one after another.

No matter how the times change, he has always been No. 1 in the world and has never changed.

- Description from novelbuddy

Her brother, who was the one who caused a coup d’etat, had sliced her throat. After she returned to the time before she died, she decided that she would somehow tame him and survive!

But..

Did she tame him too much?

***

“Brother, why don’t you get married?”

There was no reply from him, instead the glass that he held popped and cracked.

“Oh no! You’re bleeding.”

“Why should I get married?”

“Eh?”

“I already have you.”

Why should you get married, you say? You have to get the Empress so I can leave this castle! Sezh laughed strangely.

“Sezh.”

At that moment, she stumbled and Raytan pulled her body into his arms. His red eyes started to gleam suggestively while looking down at Sezh who was trapped in his arms.

“You know we are not real siblings.”