Death March kara Hajimaru Isekai Kyusoukyoku (WN) - 18-19. The Princess’s Career

Kai of the Sorcerer’s Tower is one of the last mages left, barely surviving in a world ruled by creatures of the dark — where the era of mages ended, and most of the lands got contaminated with dead mana. To save his world and fulfil his master’s last wish, he put himself through a forbidden ritual, risking his soul being ripped into pieces to make his way into the past. In an era with abundant mana — an era yet to enter the Golden Era of Magic. Things go wrong, of course, as they always do, and he finds himself thousands of years before the world fell to mana contamination — in the body of a young lord, Arzan. All is not well, though, as the young lord was murdered by someone right at the cusp of a beast wave threatening the territory, while larger threats loom on the horizon. There was a lot to do for Kai to regain his former strength in this time of primitive technology, but then again, he might just be able to change that.

In the depths of a newborn universe, a cultivator takes advantage of the abundant energy to refine himself a treasure. But after 14 billion years of refining and quite a few more to go, he decides to entertain himself by releasing countless systems and watching how the creatures of this fledgling universe handle them.

On Earth, a young man, lost and confused about what to do with his life, sits in a park and looks up at the night sky. A shooting star, a wish and a bang. When the boy finally wakes up he hears a sound, "assimilation complete. Launching System. Welcome to the Midnight Inn. Host Designation: The Innkeeper."

I was on my way home with my friend when suddenly, I spotted a beautiful catgirl cosplayer with white hair. But something felt off—I couldn’t recall seeing her in any anime, manga, or games I had ever come across.Confused, I asked my friend standing next to me. To my shock, my friend’s response sent chills down my spine:“Huh? What catgirl? What are you talking about?”Suddenly, a truck came barreling toward the girl. Without thinking, I rushed to save her. In the end, both of us were hit by the truck.Now, I finds myself reincarnated in another world, in the body of the very catgirl I had seen.But... who is this girl?How is she related to the dungeons that keep popping up in the new world?Read to find out.-------------------It's really fun, with a lot of catgirls cute moments that let you explore what it's like to become a catgirl. (Like, what do they eat? Do they hate bath? Does their tongues have spike? Can they survive falling from high above?) There's a lot of sweet romance development and of course, some spicy chapters. But on the other hand, there will also be some intense action and dark moments as the story progresses.MC will be very confused emotionally and can be a bit annoying at first since she has to adapt to the catgirl genetics. Don't expect smut chappies right away because there has to be at least some relationship development.Slice of life slow start, slow burn, a lot of action later on.

To correct the mistakes of his past, a young man is forced to narrow the space between science and witchcraft, as he ventures on a quest to save his world from complete destruction.