Toaru Majutsu no Index - Volume 18, Epilogue: The Nation and a Powerful Enemy Even Further Behind It All. Next_Step.

It was a time where demons roamed the earth and chaos reigned. The story took place in Luoyang, the legendary capital of the times. During the night, one could find people holding on to their food with dear lives as they faced off against stray dogs, people with weapons in hand vowing to fight against Fate to their very last breath. There was bloodshed everywhere as some died meaningless deaths, while the strong tyrannized the weak and the truth was frequently hidden. Some of the citizens had completely lost their mind, while some died on their travels. Most importantly, the words of a certain youth caused much panic in the human world. It was a time of little warmth as nights in the capital were frequently accompanied by gusts of wind and rain, and it would be covered with snow during winter. Such were the days…

- Description from Novelupdates

This is a reincarnation/isekai story, about Matt (later TreeTree), an overpowered tree in a fantasy world that serves as the battlefield for an ongoing conflict between demons and the heroes summoned to oppose them.At first a bystander, over a long period of time, TreeTree will learn all sorts of skills, gain levels, and in doing so, build up a forest, train young subordinates, protect a village, and more.

Opening her eyes, she becomes the eldest daughter of the Great General of Liuyin Kingdom.She is the modern girl that transmigrated into a world that only respects the strong.Bullied by her cousins...Broken engagement...She did not care about all of that.Her motto is inspired by one of her favourite anime, Hyouka: “If I don't have to do it, I won't. If I have to do it, I'll make it quick.”“You already come into this Lord's hug. Don't you dare to run?” A Lord threatens her.“Do you think I'm scared of you? You can keep dreaming.” She spoke back.She just wants to have a peaceful life, however, can she has it?

“I'll take this child.” Sold to the Wudang Sect's outer martial arts training hall for three silver coins at a young age, Kwak Yeon dreams of mastering supreme martial arts. But can he overcome the needle-sized gateway barely permitted to trainee instructors and rise to become a disciple of the main sect? “A true gentleman cannot stand idle in the face of injustice!” Thus begins Kwak Yeon's unyielding journey through the martial world, following the ruthless principle of “Kill Buddha, Kill Ancestors”—destroying all obstacles in his path!