A Hentai System in the World of Danmachi - Chapter 1: Prologue.

In a world where strength reigns supreme and only the strong are revered, conflict and injuries are commonplace.

At the movie premiere, a curious reporter notices the marks on Xia Siyu’s neck. “What’s that?”

Xia Siyu flicks her hair carelessly. “A mosquito bit me.”

After returning home, Bo Yan pins her against the wall, his voice teasing yet dangerous.

“A mosquito? Do I need to bite you again?”

Xia Siyu gains weight easily and is always fat shamed with words like being “as fat as a pregnant woman”. One day, she is mocked so harshly that she appears on the top searches. While everyone thinks of it as another joke, the movie star, Bo Yan, replies unexpectedly, “Thank you for your well wishes! Our baby is already three months old.”

Wang Guorui traveled to Taiwan in 1895, and obtained a super gold finger—the Red Police Base.

Since then, the whole world has been changed.

The Emperor of Japan: “He must be eliminated, otherwise our great Japan will never have peace!”

The Russian Tsar: “Please stop fighting. I will marry my daughter to you and cede Siberia as a dowry.”

British Prime Minister: “Why did I wake up and the navy of the British Empire is no longer the number one in the world?”

German Emperor: “Dear and brave German soldiers, please persevere, our Eastern allies are coming soon!”

- Description from novelbuddy

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates