Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 17 - Chapter 17-13. Changing World 2

Empires rise and fall on the Yulan Continent. Saints, immortal beings of unimaginable power, battle using spells and swords, leaving swathes of destruction in their wake. Magical beasts rule the mountains, where the brave – or the foolish – go to test their strength. Even the mighty can fall, feasted on by those stronger. The strong live like royalty; the weak strive to survive another day.

This is the world which Linley is born into. Raised in the small town of Wushan, Linley is a scion of the Baruch clan, the clan of the once-legendary Dragonblood Warriors. Their fame once shook the world, but the clan is now so decrepit that even the heirlooms of the clan have been sold off. Tasked with reclaiming the lost glory of his clan, Linley will go through countless trials and tribulations, making powerful friends but also deadly enemies.

Come witness a new legend in the making. The legend of Linley Baruch!

Qiao Zhenzhen spent a lifetime, only to later realise that she was the true heroine of a novel. According to the original plot, her life was supposed to be smooth sailing and blissful. But the envious transmigrated second female lead played her cards step by step, and took everything away from her!

After experiencing the divorce of her parents, and miserably failing the college entrance examination, she gets kidnapped along with her little follower of a male lead, Chi Shen. In the end, she came out as the only survivor.

Everyone believed that this was a blessing in disguise, not only was her life saved, but the pervert stalking her for the last three years was also gone! A freak like Chi Shen, who had a weird and eccentric personality, always stank of fish and grease, was better off dead. Everyone said that she ought to be grateful, but none of them knew he died protecting her.
Before he took his last breath, his dying words were-

“Don’t be afraid of me.”

That sentence, mixed with the smell of greasy fish and blood, flashed in her dreams every night for the next decade.

Reborn back into the senior year of her highschool, she walked to the youth in the corner, and in front of everyone’s eyes-

“Don’t hideaway in the dark if you don’t want me to be afraid of you.” The youth pursed his lips, his pale face steadily losing color.

Qiao Zhenzhen smiled: Be nice to me, and I shall allow you to stalk~

- Description from Novelupdates

“I will conquer all of your women.”

“I will destroy you in your strongest.”

“System? Golden Finger? Cheat? Old Grandpa? Nothing will stop you from getting defeated by me.”

Jack, who got a second chance will not listen to his rationality anymore. He will do what his heart wanted from the very beginning. He will enjoy this reincarnation to its fullest.

It was only after Su Yayan's death that she realized that she was a malicious cannon fodder female character who became a scapegoat in a Mary Sue story.