The Countess Lives Twice in the Apocalypse - Chapter 15: Fourteen

She is the legend of the Heavenly Soul Alliance, the king of mercenaries with a perverse personality, the world’s number one head reward, she closed her eyes unwillingly in a conspiracy, but opened her eyes in the mountain of corpses in another world, when he met her , he knew at a glance that she was the love disaster of his life, he was unwilling to resolve it, and held her in the palm of his hand, and accidentally spoiled her to the sky, shocking the three worlds.

“Your Majesty, it’s too bad. Your Majesty led tens of thousands of soldiers to level the Shuize Empire and smashed the dragon’s Nilin one by one!”

Without raising his head, a certain person said two words softly, “Follow her!”

“Your Majesty, it’s not good again. The empress is too handsome in a golden armored uniform, and she was thrown down by the goddess of Luoshui as a man!”

A certain person with a face full of black lines, gritted his teeth, flew out, grabbed the goddess and threw it back, half-fading the golden armor, hugged the lazy and handsome boy tightly in his arms, and said with a gloomy face, “See clearly before rushing, She’s a woman!”

The Goddess spoke weakly, “I don’t mind her gender, I love her for who she is!”

Someone was murderous, “I don’t mind, she is my woman!”

- Description from novelbuddy

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

In a world ruled by ten royal families, Saruto was born into the Lewin family (the Dark family). He grew up carrying a promise he made to himself with his mother's last breath: to become the pride of the Lewin family (the Dark family). He is compelled to acquire power to help him achieve his goal. In his quest for power, he begins to uncover the origin of the Dark Power that suddenly appeared in his world without warning. He realizes that his family's history is deeper than he thought. How will he discover his family's history, and will he be able to fulfill his promise to his mother to become the pride of the Lewin family (the Dark family)?

The story of an emergency room doctor dying from overwork and crossing into another world.

…

The sails of the great voyage have been unfurled.

The steam engine has yet to roar to life.

The glory of the Radiant Lord illuminates the continent, while across the sea, the churches of the gods and mages support the monarchy.

Dwarves freely roam the cities of the kingdom, and the legends of werewolves, vampires, elves, and dragons never fade.

In such an era, Wu Zhou, an emergency department doctor who died from working overtime, transmigrates into the body of Garrett, a young city guard.

Teammate: Oh no! The Captain is seriously injured, his intestines are spilling out!

Garrett: Help me up; I can still stitch!

Teammate: …What?

Garrett: …Apply a healing spell to where I stitched, let it grow… no, first apply it to the stitched layer, then the muscle layer, and so on.

Teammate: …What?

Garrett: Uh-oh, the healing spell is too fast, the stitches grew inside the wound!!!

When modern medicine meets magic and divine arts, what brilliant sparks will it ignite in this New world?

Garrett: Learning magic, mastering divine arts, expanding territories, and clashing with the church… whether you believe it or not, I just wanted to open a hospital.