Three Cheers For Sweet Revenge

Summary:
Eyama Aito, a high school student, is the victim of daily bullying. One day a strange letter arrives inviting him to a "captivity game." He may choose one person to hold captive for one month with a chance at winning a large amount of money. He chooses the ringleader of his bullies, Aya Kirishima, and the only rule of the game is to not kill her. Everything else is fair game. Eyama's revenge begins!

Great if you like blood, and seeing people piss themselves

Summary:
Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the world, only to die by the hands of the companions he trusted.
He died, but his story had yet to end.
"The following is a system message. Tutorial Mode has been terminated"

Just read the first chapter, if you're looking for revenge there's nothing sweeter than this.

Summary:
During the school trip Touka and his classmates are summoned to another world. However Touka was the only with the lowest rank: E-rank. An overwhelming low status when compared to his classmates. Thus the former mob-character and abandoned hero, will absolutely become the strongest devil as he advances and strikes back.

What I like about this manga is that the MC goes from weak to OP almost instantly. Nothing better than an OP character taking revenge.

Summary:
aul 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.
Obtaining the power of darkness, Raul was revived. Sneering, he vowed revenge. “Oh, I’m looking forward to it – I'll bask in their blood to my heart's content.”

Absolutely adore this manga. MC is OP, smart, and likes to f*ck around

The manga centers on homicide detective Hiroki Dan, the son of a former police superintendent general, and who seems to be on the fast track to career success. He maintains a hidden identity as a serial killer responsible for more than a hundred murders of people he deems beyond the reach of the law.

Long story short intense bullying covered up by money/influential parents. Kids get let off and years later go back to kill (?) MC. MC gets strong and is on a mission to kill them all + their families

The first couple chapters are okay, and then start getting exciting around chapter 13 ish. Also I'm usually not a fan of women characters because authors usually make them annoying, but the FL (kinda not really romantic interest) is really cool, self-reliant, and doesn't get in the way

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, wage war against humanity for true peace

Angela was my friend who I wanted to give anything to and thought more precious than my own family. I eventually turned Angela, a lowly aristocrat from the countryside, into the flower of capital society. But it was betrayal that came back. She sold me and my family to become an imperial princess.
"...did you have to go this far?"
"Because I wanted you to be unhappy. I wanted to take your whole life away."
But when I thought I had died under the guillotine, I was surprisingly

When Aoi's girlfriend Haru jumps off a building and barely survives, the class is puzzled. Especially Aoi who thought things were going well with him and his girlfriend, however when attempts to calm the class down with a theory of failed relationships, accusations begin to emerge and tensions begin to run high. Aoi will soon uncover a frightening conspiracy of his hateful classmates.

This manga has a lot of potential, and the MC seems like a relatively normal guy at first glance.

In order to clear the name of 'Emi,' a girl who had reincarnated as Remilia, the villainess of an otome game, the real Remilia who had been watching all along inside awakens.
Now it's time for the true villainess' revenge to begin!

It's a double body swap boys! Very unexpected and very cool, don't need none of these flakey hoes anyway, and they were all ugly too!