Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 2 - 2-7. Demon Return

Aaron, a wildlife biologist, became a military strategist right after a global war between nations began.He never wanted to participate in the war but he had to, because he wanted to continue his studies on endangered species the moment the war was over, but to his surprise, everyone in his unit were killed, including him, and the next thing he knew, Aaron woke up in the body of a young noble having a similar name to his.However, he also noticed he had awoken in a world different from Earth.In this world, demonic beasts ran rampart with only one thought in mind, causing them to feed on anyone they see, be it humans, elves or even magical beasts as well.During his first encounter with a magical beast, Aaron awakened a system which allowed him to bond with magical beasts and to obtain terrifying abilities from these bloodcurdling magical beasts, so he used his experience as a wildlife biologist to help make it easier for him to bond with these beasts.However, Aaron also noticed he could evolve these beasts if their loyalty towards him had reached a certain level, so he vowed in his heart to grow strong enough to protect those he cared about in this world with the hope of living a happy, peaceful life where he'll be able to focus fully on his passion as a wildlife biologist.

“I'm one game away from reaching the master rank! I'll do it tomorrow, though. A true gamer knows when to refresh his mind and increase his victory chances!”Adam smiled in anticipation as he went to sleep on this special day.However, he could never have imagined the surreal awakening that awaited him.“What's wrong with my voice?!”“Claws? A tail and horns, too?”[Welcome to the demon realm. You have been selected to reincarnate as a Lord. Conquer this realm of fire and ashes, become its uncontested ruler... or die trying.]Reincarnated as an imp in the cruel demon realm, at the borders of the mythological demon Baal's territory, his life seemed doomed from the start.However, determination sparkled in his eyes as against all odds, he defiantly proclaimed.“No matter who decided to make me start as an imp, watch as I turn into a veritable devil. Even Baal won't hold a candle against me in the future!”Equipped with his unique talent, he started his lord's journey, ready to evolve and prove to those strange realms that demons were more than violent and deceptive creatures... at least he would try.

Zaiden Archman. He’s the main character in my novel called ‘Awakener’s Dead Harem’.

As an author, I love it when my main character suffers and is depressed.

He’s the main character that I took pride in. With my novel about to end, I pushed myself to write the last volume.

However, what I never expected was that it would be the end of me too. When I opened my eyes again, I had become Vincent Dihart, an Extra in my novel, who is only mentioned a few times in the novel.

I then found out a sad truth about my Main Character that I took pride in. He has changed.

He’s not the Main Character that I made. He’s a Reincarnator. Someone has replaced my Main Character. And that someone has read my novel.

I feel empty and betrayed.

As an Extra, I will not be able to save this world from danger.

Only the Main Character is the one who can save this world. But, he will also not be able to do it without being depressed.

So the answer is clear.

“I will make him suffer.”

This is my story about living as an Extra. And once in a while, messing with the Reincarnator to make him suffer.

Gold, wood, water, fire, earth, wind and thunder are the seven elements in the world.Everything in the world is made up of one or more of them.As long as the structure is set up, and then according to a certain proportion, in a specific position, add the right amount of elemental energy with different attributes, you can create everything in the world!And, I, Xiao Ye, am the master of the elements. …… ……Young Ling Chen awakens a mysterious physique, and from then on, he defeats the geniuses, kills the heroes, and dominates the world!Ling Chen: Sorry, I am the kind of genius you hate the most!