Manga Where Main Character gets Betrayed and seeks Revenge.

1. Kaifuku Jutsushi No Yarinaoshi.

Healing magicians cannot fight alone.’ Keare, who was bound by this common knowledge, was exploited again and again by others. But one day, he noticed what lay beyond healing magic, and was convinced that a healing magician was the strongest class. However, by the time he realized that potential, he was deprived of everything. Thus, he used healing magic on the world itself to go back four years, deciding to redo everything. This is a heroic tale of one healing magician who became the strongest by using knowledge from his past life and healing magic.

2. Nidome No Yuusha.

Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the very world, only to meet an end filled but with betrayal. The companions that he’d trusted throughout his journey betrayed him and killed him by sticking a blade through his chest. It was then that he swore to himself. He swore that, if given another chance, he would no longer so rigidly cling to the concept of “faith.” He swore that, if given another chance, he would dedicate himself to enacting the most atrocious act of revenge possible. He swore that, if given another chance, he would do things right. 「I’ll kill every single last one of you… I swear it…」 And so, he died, leaving behind not but a series of menacing last words — but his story had yet to end. A voice resounded through his head and informed him that there was more to his fate than what lay beyond the grave. 【The following is a system message. Tutorial Mode has been terminated.】

3. Dungeon Seeker.

Junpei Takeda, a high school student, is childhood friends with Noriko Tatsumiya and the bully Kido Shouta. One day, during the usual course of bullying Junpei, they were suddenly summoned to a different world by the whim of "God". Summoned Heroes with cheats, or so he thought. But it turns out Junpei's stats were even worse than an average farmer. Tricked into a deathly labyrinth by the only one he trust, he walks the journey for revenge.

4. Fukushuu O Koinegau Saikyou Yuusha Wa, Yami No Chikara De Senmetsu Musou Suru.

Raul who had defeated the demon king as the strongest hero should have become the savior of the world. Having his treasured companions and family killed by power hungry aristocrats, he was executed with false charges brought against him by the princess. Just before his life collapsed, at last his heart fell into darkness....I will tear those traitors from limb to limb. Burn them at the stake. Sever them to pieces. Skewer them. I will kill every one of those bastards without mercy and make them taste hell's suffering.....!!!
Obtaining the power of darkness, Raul was revived. Sneering, he vowed revenge.
“Oh, I’m looking forward to it – from now I'll bask in their blood as I please.”
Several days after the hero's revival in the imperial capital where flowers bloomed in profusion, the parade that would advance towards tragedy began.

5. The Executed Sage Is Reincarnated As A Lich And Starts An All-Out War.

The Sage Dwight, he along with the Hero defeated the Demon Lord who sank the world into darkness.
However, they were falsely accused of becoming the next Demon Lords because of his power, and were thrown to The Valley of the Dead to die.......
But though his flesh has rotten away, he lives on as a skeleton because of his grudge against the world. Dwight has vowed to deny that wrong world, and with a power that surpasses even the Demon King of the past, and also leading countless Skeletons he's going to start an all out war...!

6. My Gift Lvl 9999 Unlimited Gacha.

A human boy name Light is kicked out from the adventurer party called the “Race Union(gathering of races)” by his trusted comrades.

7. Ubel Blatt.

When the black blade roars, all who stand in its path shall be torn asunder…! What is it that Koinzell, the mysterious young boy who wields the sword with such exceptional skill, desires? The fight against the “Lances of Betrayal,” who were thought to have been defeated by the Seven Heroes, begins--And at battle’s end, only the shocking truth will remain amid the pools of blood.

8. I Became The Strongest With The Failure Frame "abnormal State Skill" As I Devastated Everything.

During the school trip Touka and his classmates are summoned to another world. <br>However, Touka was the only one with the lowest rank: E-rank — an extremely low status compared to his classmates. Thus, the former mob-character and abandoned hero, will absolutely become the strongest devil as he advances and strikes back.

9. Garbage Hero: A Revenge Story Of A Hero Who Got Summoned To Another World.

While on a regular school day, Tsukuru along with his classmates got transported to another world. However, at the other side of the summoning there was a hero's auction, where each nation would bid for the heroes to defeat the demon kings of each territory. While his classmates received cheat jobs and got auctioned quickly Tsukuru got the useless job "Chef", as no nation bid for him, he got thrown out through a transfer gate. At the other side of the gate was a territory dominated by strong monsters...<br>As he manages to survive the monster's attacks while nearly dying, Tsukuru goes forward on the path of becoming the strongest!

10. My Cheat Skill [Resurrection] revived me, and I ended up resurrecting The ancient demon lord’s army.

Licht, a young man who has the special ability, [Resurrection], makes his living as a member of an S -Rank Adventurer's Party.
However, the King, who feared his power, ordered his comrades to betray him, and in the end, executed him in an unfair manner.
But Licht, who was fortunate enough to be revived because of his own skill, now swears to carry out his revenge on Humanity…