Gender Bender

It was in the year 2800 of the Midgard calendar. Back then, there was a Overlord who once reigned supreme and had reached the very brink of subduing the world. Her name was Ruphas Mafahl, a great woman dreaded as the Black-Winged Overlord. She was too strong, too fast, and too beautiful… However, she was defeated by Heroes who opposed her ferocity, and her ambition was brought to an end. ――or so went the story of our protagonist’s in-game character, whose body he now possesses for some reason in a world 200 years after Ruphas’ downfall.

An intricate story revolving around Han Bi Kwang, as he follows a hero s journey. Just throw in a historic setting, ancient weapons, and a riveting plotline, and you have one of the most highly-acclaimed manwha, a definite must-read.
Bi-Kwang and Hwa-Rin try in vain to shake off Sang Pil "Gold Cobra" Jin and his men, but, ultimately, they are forced to defend themselves. Unfortunately, Bi-Kwang and Hwa-Rin lose, and the Sword of the Flowers is taken from them.

Utilizing a system called "Sense," each player aims to create their unique character in the VRMMORPG "Only Sense Online." Joining this realm is Yun, an absolute beginner in the world of gaming, equipped with some of the worst customized "Sense" ever. While his two sisters, both veterans in this world, criticize his choices of equipment, he continues to delve into the skill sets he has acquired. Along his way, he meets the art of "production" and people that have mastered this art. Watch as a total novice creates a revolution in the gaming world and create the "ultimate" support class.

Chiba and Sheina, a pair of single, otaku males in their 30s that met during a highschool reunion! Shortly after hitting it off with each other, they're thrown into one misfortune after another, and before they know it... They got reincarnated in an Isekai as pretty babes!

An old school yakuza, Nagamasa Ryumatsu, ended up losing his life due to certain circumstances. But, when he awakened to a strange sort of scenery he had never seen before, he found that he had somehow changed into a beautiful girl!?

Circle Zero's Otherworldly Hero Business summary:
The protagonist, an egocentric man who's led a successful life as the CEO of a company in modern society is murdered and reborn as a beautiful lady named Paril from a noble family in a fantasy world. Once he wakes up, (now in the body of Paril,) he finds out that he's now in the body of an "inferior being" and that all his wealth, achievements and successful life have vanished. Therefore, he decides to rebuild everything from scratch and make it to the "top of the pyramid" in this parallel world.

A young girl fights on the frontlines in war. She has blonde hair, blue eyes, and nearly transparent white skin, and she flies through the air and mercilessly strikes down her opponents. Her name is Tanya Degurechov, and she speaks with a young girl's lisp and commands the army. Tanya used to be one of Japan's elite office workers, but because of a wrathful god, was reborn as a little girl. Tanya prioritizes optimization and career advancement above all, and she will become the most dangerous entity among the Imperial Army's sorcerers.

In one of the worlds that exist within virtual reality, Kagami held the title of one of the Nine Sages, a position that placed him at the pinnacle of magicians.
One day, he fell asleep in-game after pulling an all-nighter. When he opened his eyes, what he found was a world that was different to the one before… More important than anything else, was that the grizzled and dignified veteran’s body that he was used to, had now turned into an innocent little girl’s.

On a school trip to shinobi-themed Ninjatown, a young man named Ichi Kuno accidentally springs a mystical ninja trap which sends him back to the Age of the Ninja. Having no other path, he must pose as a girl and infiltrate an Kurenai Academy, a school of kunoichi students, to retrieve a mystical scroll that can return him to the future. But when everyone around him is already far better at stealth and infiltration than he could ever imagine being, it's not going to be easy.