One Piece - I Am A Different Luffy! - Chapter 367 - 366 - Heirs.

The moment when mercenary leader Kwang Hwi receives video game like abilities, the world is suddenly thrown into chaos. A thick fog envelops the Earth, bringing with it savage, otherworldly monsters. At the same time humanity has been rendered defenseless against this onslaught, as the strange fog turns most weapons to rust. With mankind spiraling towards oblivion, it is up to Kwang Hwi, with his new abilities, to save the world. Watch as Kwang Hwi leads his militia and becomes the last bastion of humanity. Will he be this world’s savior, or its conqueror?

A novel revolving around being transported to another world with an op system. The mc spends his day chasing skirts and doing missions to level up. A standard journey to the top with lots of girls from various animes and games with a twist of that gaming feel (hunting mobs, doing missions).

- Description from novelupdates

This book features a slice-of-life style with minimal system presence, welcome to enjoy.[Theoretically, this system can target any cognitive being in the universe.][After selecting a target, the host will randomly acquire the target's skill level and talent.][When the target is of the same gender, skill experience acquisition speed +50%, skill level cap -50%.][When the target is of a different species, trigger 404 aura, skill experience acquisition speed +100%, instant death probability +99%.][After a failed targeting, the punishment mechanism is activated, halving the host's basic stats, entering an absolute weak state, and resetting skill levels.]Traversing into this world, Bai Chuan Ze Ping observes this problematic system, then looks at the top student and beautiful girl of the class...Hmm, perhaps... this classmate could be a fine learning companion.PS: This book is also known as “My Talent Comes from My Girlfriend.”

What will happen if your ordinary life becomes not so ordinary? What will happen if your old existence becomes anew? What will happen if the world that you know is changing?

Our heroine, Anne, is a 40 year old librarian, that got entangled in mythical magic, inside a mysterious fairytale book. When the disaster happened, she got thrown into another world, the kingdom of Valorian, where magic and lore are coming alive. A world where she becomes younger again, but with a wisdom and knowledge of a forty-year-old woman.