Naruto: Kurotsuchi Mayuri - Chapter 24 - 14.2 : Blood Armor!!

Mu Yue traveled to the world of Naruto and became an ordinary chuunin teacher at Konoha Ninja School and a member of the Root Organization.

Fortunately, after awakening the teacher system, you can become stronger by teaching.

In order not to become Danzo’s consumables, Mu Yue worked hard to teach and increase her strength.

“Complete the teaching rated A for the first time and receive the reward – mastery of fire attribute chakra properties change.”

“Under your guidance, Uchiha Shisui has worked hard to practice, and his overall strength has been greatly improved, and he has been rewarded – the Immortal Human Body!”

Under Mu Yue’s guidance, Zhishui understood that the village’s enemies were not necessarily other big countries, but could also be within the village. People who spoke righteously about the will of fire might not necessarily act in accordance with the will of fire.

Obito got rid of the title of being the weakest person in the ninja school, and Metkai became a master of physical skills even earlier…

- Description from novelbuddy

Being sucked into a fantasy world that nobody leaves doesn't sound half bad to Cain. He was a high school dropout with a drinking problem, living off disability due to his poor health, so it's not like he had much to lose except a few faithful friends he didn't talk to enough.

After a long night of drinking, Cain wakes up looking at what he believes to be the character creation screen of one of his beloved virtual reality games, but with no recollection of having purchased it. His unwitting choice to use the Random Character Creation option, unaware that the choice would be irreversible, sends him into this new world as a Puppet Master, a Summoning based class nobody else in the starting zone has ever heard of.

But as he soon realizes, this is no game, him and hundreds of others have been brought to another world with no instructions, no clear goals and no way home. It's a second chance to live a good life, but what will Cain be able to make of it?

[System Activation Complete][Welcome, Host, to your new world.][You died, and your soul has been transported into a new world.][Mission Assigned: Build the Greatest Empire in This World]After a fatal accident, Aric awakens in a strange new world, now in the body of a seventeen-year-old half-elf with nothing but a shattered past. Abandoned by both humans and elves, he’s forced to survive alone in a dangerous forest. With no one to trust and nothing to his name.He awakens a mysterious system that gives him the mission to create the greatest empire. Aric takes up this task in other to survive, trying to make the greatest empire from scratch in this new world. Will he make it to the end other will this world swallow him.

Xiao Chen was once a great soldier of Huaxia known for his strange, unique but effective tactics and plans during operations. He would always assume command and orchestrate highly-dangerous missions and would lead his unit to success.

He was known for being a great commander which made his military rank soar, from being a young lieutenant freshly graduate from the academy to becoming one of the youngest general that Huaxia had ever seen.

Sadly though his military career was cut short when he was deeply involved in the older generals politics. He died a tragic death when he was murdered by the men who he trusted so much and considered his brothers.

His soul wandered through the river of time and space still seeking vengeance and was soon swallowed up by a swirling light.

He soon found himself in the body of a monster or that’s what others consider him to be. He had a hulking figure pack with muscles,towering nearly 7ft tall, a pair thick tusks jutting out from his mouth and lupine ears along with the great desire for battle welling up inside him.

He begins his new journey as a green hulking monster or an orc as what his kind was called, a monster born for war and lived for war.