The Black Swan Behind (Beauty of Fire) - Chapter 271

There is always such a person in the world who likes to take their ex/Bai Yueguang/best friend as a stepping stone for their love.
These exes/Bai Yueguang/Girlfriends are called female supporting roles. They obviously did nothing. Just because they were involved with the male and female protagonists, they were trampled on, hurt, and even left a shadow that will never go away for a lifetime.
Jiang centrifugally felt sorry for those innocent girls, so he traveled from one world to another to help them cross that hurdle.
However, after a certain world, the mission is obviously wrong.
Jiang Li: “I will treat you well.”
“It’s not enough.” The girl imprisoned Jiang Li in her arms, breathing warmly: “Don’t leave, you must always be good to me, only to me.”
Jiang Li: ? ? ?
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Finely divided slice attack x natural sweet and soft feeling
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World One: Campus
The taciturn facial paralyzed “bad girl” x the rich lady who is cold on the outside and hot on the inside
World II: Cultivation
Swordsmith x Sword Spirit

World Three: The World of Beasts
Orc Princess x Totem (Big Cat x Little Rabbit)
World Four: Game of Death abo
Tsundere Big Brother x Super Rookie (Double O)

World Five: Spirituality
Ghost King x Rookie Celestial Master
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Edible guide:
#1v1 Unshakable
#Su Shuangwen, everything is for Su Shuang
#gongjing is divided into slices, being indifferent to others, sweet and soft to attacking

Content tags: system sweet text fast wear cool text
Search keywords: protagonist: Jiang Li ┃ supporting role: a lot ┃ others: fast wear, system, sweet text, mutual favor
One sentence introduction: you are sweet

- Description from novelbuddy

Going for a swim, she ends up in an ancient wild Beast World and ends up being brought home by a handsome wolf.
She wants to stick to the handsome wolf, stock some salt, farm some land, look at some handsome men and grow old like that, but the handsome wolf pounces on her every day.
What? He wants her to have babies?
NO~ NO~ NO~ There is no happy ending to interspecies marriages, hurry and let go of me handsome wolf~

- Description from Novelupdates

【System flow】【Refreshing article】【Torture three and torture Gang】【Intercept Xiao Yan】Travel through Douluo Continent, awaken the god-level entry system, and see how Luo Zixi ravages Douluo, plays Doupo, tyrannizes Tang Fozu, crushes Yu Xiaogang, intercepts Xiao Yan, and becomes the Great Lord!Golden entry: 【Succubus physique: Your appearance has reached the pinnacle, but please be careful of those women】Colored entry: 【Traveler of all worlds: Give the host a chance to randomly travel to another plane (can travel back and forth infinitely, cooling time is three months)】Golden entry: 【Super Lucky: As the name suggests, it is lucky! 】...........Martial Soul Supplementary Entry: 【Guaranteed Upgrade: Unconditionally upgrade one level every three months】...........Red Entry: 【Wood Spirit Body (Ode to Life!)】............Xiao Wu: The feeling of sacrifice is painful and wonderful.Zhu Zhuqing: Thank you for freeing me from the cage of the royal family.Ye Lingling: Bad guy, you actually bought me!Qian Renxue: So you already knew my identity?Xun'er: Since I picked you up, you are mine.Xiao Yixian: You are my driftwood.Yun Yun: So you did it on purpose?Medusa: You lowly human dared to let me get pregnant with your child!Xiao Yan: I don't envy Luo Zixi's talent, I only envy his handsome face!Tang San: Traitor! Evil thief! Lewd thief! Give me Xiao Wu back!Luo Zixi: How lonely it is to be invincible, please kill me!(Funny, happy, funny, not suppressing, pure and refreshing)

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.