Invincible Uncle-Grandmaster - Chapter 431 - Side Story 10: Sidebar

In the Sky Sword Continent there are thousands of sects and strong cultivators as common as trees. In order to prevent his older sister from being forcefully married off, Lu Xuan had no choice to but to unceasingly cultivate and enter a sect to ask for a favor. By chance, a sword-shaped crystal of mysterious origins entered into Lu Xuan’s body, containing countless top-class martial skills, powerful martial arts, and everything you could wish for! A martial legend starts here…

- Description from Novelupdates

Li Wensheng transmigrated to an era where all energies were returning and every citizen practiced martial arts.Here, champions focus on martial arts mastery, becoming physically peerless as they honed their spirit. They would also seek superior weapons, including unbreakable war axes, or keen blades that could cut a giant tree with a single swing.Even so, Li Wensheng learned Immortal Arts from the very start! Though his scrawny form was exceedingly inconspicuous at first, he wielded Immortal Arts to smash long blades with his bare hands and crush giant hammers!Li Wensheng was flying everywhere on his sword while others were busy trying to surpass the limits of human speed. He could kill with a leaf or flower he plucked while others requested blacksmiths to hone their weapons. He cooked medicinal pellets with his cauldron, brewing Yuan Pellets that ascend cultivation while others trained their bodies to strengthen themselves.Martial arts champions: “Why aren’t you using any weapons?”Li Wensheng smiled, two of his fingers casting an immortal technique: Ten Thousand Swords Retrogression!At his words, every sword behind everyone’s back took to the skies without hope of control, gathering behind Li Wensheng into a rain of swords that covered the skies!This is a world where I alone cultivate immortality while everyone else trains in martial arts!

The story of otaku building a harem! School flower, loli, wife, mother and daughter, mature woman, teacher, nurse, queen, all kinds of beauties, three steps to push a girl, five steps to a group, harem group, infinite warmth, so cool that you always need to prepare a tissue for easy reading !

- Description from novelbuddy

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.