Top 5 unusual Isekai manga/manhwa/manhua

 Isekai  is an "accidental travel" genre of light novels, manga, anime and video games that revolve around a normal person from Earth being transported to, reborn or otherwise trapped in a parallel universe or fantasy world.

In some versions, the protagonist is depicted as being already familiar with the parallel world, as it is often a fictional universe from a fictitious work published in the protagonist's origin universe.

1. Fff-Class Trashero

The protagonist of our manga is a young man named Kang Han Soo, who entered the fantasy world After 10 years of torment, he finally managed to destroy the devil. And so the moment came when he had to go back to his old world.

 The local deities gave him a report card. But there’s one catch. Even though he destroyed the devil, he was given an F grade. All because of Kang’s character. Now he’ll have to start all his adventures over again. Will our hero be able to break out of this circle and return home?

2. The Beginning After The End

King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will.

Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again.

3.Re:Monster

After his unfortunate death, Tomokui Kanata has been reincarnated as a member of the weakest race, a goblin named Rou. However, Rou has retained his previous life’s memories, as well as an ability that allows him to gain strength and abilities from eating. He also possesses a unique evolutionary tree.
Now, Rou has made a promise to himself that he would live this life to the fullest. In this alternate world of survival of the fittest, events unfold with competent subordinates and comrades.

4.The Descent Of The Demonic Master

The first life. After a tragic accident losing his family and legs, he ends his own life. The second life. He earned fame as the Red Demonic Master in Zhongyuan, but was betrayed by the man he trusted the most. And now comes his third life. In his life back in the modern world, Gang Jinho decides to live a normal life… 

However, he was too used to the Zhongyuan life to become a normal person! ‘I wanted to live peacefully. But you are the ones who started it. I hope you’re prepared for this.’ In front of the threats of his new life, can Gang Jinho shake off his impulses as the Red Demonic Master and obtain the ‘normal life’ he desires? The adaptation story of a legendary martial artist in the 21st century!

5.Master of Gu

A story of a villain, Fang Yuan who was reborn 500 years into the past with the ChunQiu Cicada he painstakingly refined. With his profound wisdom, battle and life experiences, he seeks to overcome his foes with skill and wit! 

Ruthless and amoral, he has no need to hold back as he pursues his ultimate goals. In a world of cruelty where one cultivates using Gu – magical creatures of the world – Fang Yuan must rise up above all with his own power.