Toaru Majutsu no Index: New Testament - Volume 18, Prologue: Connection Point - Destiny_Joint.

In a world that blends the magic of the steam age with the grandeur of the medieval era, a man wakes up suddenly in a body he does not recognize, in a strange reality that does not belong to him, bearing a name that is not his and a mind stripped of all memories. His name is Jevan or so they say.In the city of Medlia, specifically in the lower district, where poverty and misery reign, the people are not ruled by laws but by fear of the gangs.Jevan discovers the existence of extraordinary powers known as Authorities abilities that defy all logic, wielded by some for domination and by others as a means of survival. Before long, he finds himself cornered on all sides:Bloodthirsty gangs, mysterious agents, secret organizations. He becomes entangled in countless troubles from a past that is not his own. In a city torn apart by class struggles, devouring those without power, Jevan begins a journey to uncover himself or the truth of the body he never chose and has no luxury of escaping.

The year was 2030 when dungeons descended and wreaked havoc across the world.Fortunately, along with the descent of the dungeons was the awakening of various people obtaining superpowers, allowing the world to barely defend against the worldwide threat.Five years later, Desther, a young man that only wants to watch anime and read online novels, awakened the SSS-Grade Talent, Ultimate Thief, allowing him to steal a target’s attribute in battle and making it his own.However, along with the overpowered talent, was an announcement he wished he never got.[You obtained the title, [Chosen One]][Clear the dungeon or Die!]

Ye Xiao was a superior cultivator in his previous life. The three factions of the realm kill millions of people every time they attempt to seize cultivation resources. Wealthy towns turn to wastelands in just a single night. They cover up their crime with an assertion that the towns were suffering from pestilence and disasters.

They forcibly hold all the resources for cultivation, monopolize all valuable practice materials, and keep outsiders from cultivating so that only their three factions could cultivate in the realm. Ye Xiao declared war against the three factions in retaliation for their actions. He fought alone and ended up dying in vain. However, he is reborn into the mortal body of a 16-year-old boy. He will use the powers he cultivated in his last life and slaughter his way back into the Realm. The story begins!

- Description from Novelupdates

Turns out your childhood best friend — the one you always thought was a dude — was a babe all along....And she has WHAT? A Yuri harem? (An all-girls harem? Seriously?)While she attracts women as easily as breathing, women run away from you the moment you breathe?