Douluo Dalu 2: The True God King - Chapter 69: [DD2]:

[Hottest Blood-Boiling Thriller]The Divine Level Expert from the apocalypse is reborn in the city. He intended to live a low-key, restrained life, but women broke off engagements with him, his family abandoned him, and everyone looked down on him…“I was low-key, but you forced me to be arrogant. Since it's come to this, then let Heaven be in awe, let the earth tremble, let the whole world go crazy because of me!” —Ye Tianchen.

When Cheng Qianfan opens his eyes every day, the first reaction in his mind is: What is my identity today (which vest should I wear)?

This book is also known as “Ace Agent: My Vests Are Countless”.

The red ‘flame’ hidden deep inside the enemy, the agile and outstanding member of the red team ‘Chen Zhou’, the favorite general of the military commander Dai Chunfeng, the blue bird… and so on.

However, he knew that he was Cheng Qianfan, a staunch red warrior!

“In the dark, you firmly watch the sun in your heart; in the long night, you silently give birth to the dawn of dawn; in the tiger’s den, you bear the burden of humiliation and wait for the time; in the battle, you rise quietly, killing the enemy invisible; no one knows your name , your feats will be immortal…”

His story begins in the early spring of 1936…

- Description from novelbuddy

In this world, there are people who are born to suffer. They have no home, no children, no relatives, and even die tragically at the end, just like Qin Xiangnuan, who carried her burdens alone. In her thirties, she is just a flower that bloomed only to wither in her declining years, and she also has nothing.There are also those who are born to enjoy blessings, possessing wealth, beauty, a capable husband, and smart, beautiful children, yet they still take someone else's life, just like Qin Xiangmei. Though being biological sisters, she plotted against her sister from childhood until her death.If it weren't for rebirth, Qin Xiangnuan would never have known that her half-sister, Qin Xiangmei, not only took away her father and her elder brother's life but also the only keepsake her mother had left for her, and even a tremendous opportunity.

Liola—the best assassin in his world—has vowed to kill no more. He was being chased by an assassination organization when he accidentally dropped into a parallel universe: through a dimensional gate and into poor teenager Kaiser’s apartment. Instead of going to the government shelter for lost dimensional travelers, Liola and Kaiser wind up going to school together.

Liola has been trying his best to live the life of an ordinary person, but after certain things happen one after the other, he begins to realize that being an ordinary person could be harder than being an assassin.