My Father in Law is Lu Bu - Chapter 643

Young Chen Xiang had a fateful encounter with a goddess & demoness and received their peerless heritage, divine pulses, ultimate martial arts, and transcendent alchemy techniques, which gave him an easy ride in his journey of cultivation.

When hungry, he refines some spirit pills to eat as snack, when lonely he flirts with the goddesses, when bored he teases those martial artists who came to beg for spirit pills, when tired he lets his beautiful wives massage him.

- Description from Novelupdates

Sealed Kaguya;Mikoto on her wedding night;Kushina during the Nine-Tails' Rampage;Kidnapped Konan...Uchiha Kage, who crawled out of the pile of dead bodies from the night of the clan massacre, discovers that every night he can enter a mysterious space.The space not only contains real female ninjas, but also real instances that update from time to time.Furthermore, by absorbing the dropped ninja fragments, he will also gain the abilities of the corresponding ninja.Crap, it's like I've started playing in the real Naruto world!You say I'm inherently evil?That's right, from now on, I am the most evil Uchiha!I'm going to make Konoha... No, I'm going to turn the entire ninja world into a paradise that belongs to only me!——Sasuke: I treated you like a younger brother, but it turns out you're my dad?Naruto: Awesome, Sasuke! Turns out we're actually blood brothers!

A man who was once called the world strongest agent ended up becoming a teacher after his retirement to train the new generation of agents. After many years of training his disciples, he is killed at the age of 60 by the ploy of a secret organization and was reincarnated in another world with all his past memories.Though he was surprised by the magic and the strange species of that world, he adapted very fast to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his tight discipline in order to reach his goal: resume his career as a teacher which he left halfway through in his previous life.This is the story of a man who based on the memories and the experiences of his previous life, became a teacher who travels through the world with his new students.