Rivers of the Night - Chapter 1: Rules of an Assassin

Zheng Tan somehow returns to the year 2003, turning into a black cat. Picked up from a rubbish heap by the Jiao family, he is given the name “Charcoal”, and so begins the life inside Professor Jiao’s family. Zheng Tan remembers that he was once a person, but currently his body is that of a cat. He has no way of speaking the human language, but can understand it, and even retains the thinking and IQ of a young 20 year old youth. Read along as he adapts to this new world, and somehow tumbles from a group brawl to catching a thief.

- Description from Novelupdates

It was the year 3090 AD, the virtual reality net game “Swords and Magic” was developed on Earth, and the game would descend upon the world in ten years! In order to survive, the only way was to tame various powerful monsters in the magical world. That’s the only way to make oneself more powerful and take control of the gods’ power! Jiang Bai reincarnated to a time before the game was launched. By relying on his memory, he successfully obtained the Infinite Beast Taming Encyclopedia. Divine Beast Black Dragon Princess! Sacred Beast Dark Night Elf Queen… Jiang Bai asked, “Why is everyone else’s pet beasts animals, but mine is a bunch of gorgeous girls? I’m going to be sucked dry. I need help, quick.”

What if something made Naruto the dead-last that everyone perceives him to be? What if he really wasn't as weak as he appeared? The true Naruto, unleashed upon the shinobi world! AU story starts at the Konoha Invasion arc and continues from there..

The youngest princess of the country of Stellaus, Marietta, was betrothed in a political marriage to the General of the great militant country, Oltaire. General Belvant was often said to be strong, a fierce and terrifying god of a warrior. On the other hand, Marietta was a delicate flower of a princess. Everyone felt pity for poor Marietta’s situation, however, the truth was that Marietta found the General very dreamy… The story of a 30-year old General with a scary face (who was actually quite nice), and the tiny and adorable 18-year old Princess in their times of conflict and of lovey-doveyness.