As a result of a combination of his good-natured personality and bad luck, Shiki Orifushi ends up enrolling in St. Lukeman's Academy, a school renowned for its delinquent students.

Before entering the school, Shiki had lived a life far removed from being a delinquent, but at St. Lukeman's, he was an herbivore thrown into a predator's cage.
Shiki was well aware of his situation, but his sense of justice and good-natured personality make him catch the attention of one of the school's numerous gangs of delinquents.

For the next year, Shiki was bullied by the delinquents and lived through hellish days, but one day, he almost bumped into the school's strongest delinquent gal, Karin Kohinata, in front of a vending machine. As a result of this, Shiki's school life changes completely.

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.

Ostracized and tormented by his peers to the point of breaking, Kazuhisa Kaya set off into the nearby forest atop the mountain with one purpose: to dig a pitfall and bring about the death of the person behind his suffering. However, right when Kazuhisa was about to succeed in his revenge, a sudden earthquake throws his plans out of whack! Caught unaware, all he can do is patiently lie in wait until someone lumbering across the path happens to fall into his trap. Kazuhisa’s excitement is short-lived, however, as the corpse at the bottom of his pitfall turns out not to be the bully he was expecting but a grotesque, pig-looking monster, and his confusion only grows as he’s suddenly greeted by a pure-white room and a RPG-like status screen.

Strange monsters now wandering the mountain and with newfound powers at his disposal, Kazuhisa is forced to throw all concerns over his tormentor to the wayside as he focuses on a new goal: survival. That’s not going to be as easy as it seems, however, as he’s not the only one to have been wrapped up in this mess…

Seven women, one man, a suspenseful harem story!

During a class reunion, the school became an enclosed dimension without warning. Yelling and screaming brought no response. 26-year old unemployed Haruka Sato has to survive by cooperating with seven of his former classmates. Soon, the extreme conditions began to eat away at their sanity, and Haruka's hidden desires began to take hold.

The mafia boss of the Iwashi family is a high school girl named Konomi Minoko. But don’t let her appearance fool you; she has done and seen things normal citizens can’t even imagine. Under her control are two assassins who have gained legendary status for their deadliness and ability to get any job done. Ishikawa Rushia, codenamed Baret, uses a modified handgun that uses a custom made hollow point bullet that explodes the target from the inside. Shirato Marin, codenamed Francesca, uses a original weapon that is a mix between a throwing axe and battle axe. Both of them are Minoko’s high school classmates and seem like normal teenagers but are two of the most feared killers in the mob world who handle missions often involving other assassins and underground groups.

"I can't do this!"

Yoke Feldio, A Red Mage, has left his A-rank party of five years to become an adventurer, and has finally run out of patience with his life as an adventurer. being ridiculed as a "Handyman" and "poor dexterity"!

And so begins a desperate life of joblessness....

HOWEVER! Soon after Yoke is welcomed into a party of former students, all of whom are girls! And as he conquers dungeons, Yoke's abilities are revealed one after another.

In fact, the magic and skills that he wields have a power that is beyond the norm--?

The protagonist along with his step-mother, and 2 step-sisters are summoned into another world where demi-humans are the rulers as saviors, but its not to fight against a demon lord, its to fight an Undead Apocalypse monsters called "Dead Mell" that have overrun the world and that can only be killed by using weapons made with holy silver.

For that, a familia is made (group of 4 people) with them being the swordmaster that uses the holy sword, the guardian that uses the power of earth to protect, the healer that use the power of water to heal and the black mage that uses the power of fire to destroy.
The role of the guardian, the mage and the healer is to support the swordmaster that can only kill the monsters.

But to use magic powers one must offer part of your being as a sacrifice to form a contract with spirits, and the higher the sacrifice, the higher the power. Now they must choose who are the 3 that need to sacrifice part of their bodies to gain power and who will wield the holy sword.

I was bullied by everyone, so in return I'm going to slaughter them all.
Taking inspiration from the 31 days of the calendar, the uber popular girl group Calendrier was formed. Behind the bubbly appearance, in the shadows, there is one member that is bullied by the others on a daily basis. "If you can't smile, then neither will the fans."
She is willing to do anything to regain the smile that was robbed by her group mates.

With 30 members as her opponents, this is the story of the crazy number 31.

Na Hae-soo's life unravels when her husband betrays her with an affair, leaving her burdened with debt and losing their child. In a devastating blow, she witnesses him with a younger woman. Broken and despondent, Na Hae-soo feels her life crumbling around her. However, a mysterious young man unexpectedly enters her life, asking to be taught about adult love. His vulnerability and sincerity begin to stir emotions within Na Hae-soo, challenging her to reconsider her path forward.

From MangaHelpers:
Nogawa Izumi is a good student, and a class representative, but she has an increasingly high libido. It's gotten to the point that she'll claim to feel bad during class, so she can run to the nurse's office and masturbate. When she learns that the Earth is being invaded by aliens that look like people dressed up as animals, it turns out her high sex drive may be able to help protect the Earth. The first time Izumi is attacked by the aliens, she is rescued by Usayama, a bunny alien whose race was their previous victim. Usayama gives her a swimsuit that will allow her to fight the aliens, but which also sends her constant arousal through the roof. The scientific organization that Usayama is affiliated with think that Izumi, with her high erotic level, may be the person they've been looking for to fight the aliens. Will Izumi be able to save the Earth?

When the Devil King announces his retirement, he calls forth his two sons, Yomi and Sora, to give them each a quest. Whichever of them finds a pure Yamato maiden within a year would inherit the throne of the Devil King, while the other would die. Thus begins Sora's sex-fuelled adventure to find a woman that can satisfy his father...
(Sakigake!! Otokojuku Wiki)

Masamichi Akita, a high school student whose motto is to live wisely, who meets Setsuna Rikudou, a high school girl with a violent supremacist attitude.

Akita is saved by Rikudou when he is tangled up with a delinquent, and is attracted by her overwhelming strength, asks her to teach him how to fight. However, Akita is devastated by Rikudou, who asserts that “violence is the only rule in this world”.

Akita's encounter with Rikudou leads him into the world of “violence”.

”Is it okay to kill people?"

A treacherous revenge suspense by Shiryu Nakatake, a newcomer to Bessatsu Shonen Magazine.

"Shun, if someone is converted, let him go and do nothing. He should be given a chance to be reborn."

"Grandpa, I hope he doesn't reincarnate himself."

In order to defeat several non-human monsters, the boy also became something non-human.

Shin Uruma, a sixth-grade student, was named "Experimental body: A" by five of his classmates and was severely bullied and lived in hell. His only peace was with his brother, who loved him, and his parents, who protected him.... . until the five monsters killed his family.

When he finally loses everything and faces true hell, a dark "wish" is born inside Shun. He was reborn under the training of his grandfather, who served in a secret unit during WWII. Now, four years later, he appears in front of his fated enemy.

"I won't let ANYONE get in the way of my revenge."

Kaede, a victim of past sexual abuse, is obsessed with becoming "normal" ...

A bittersweet story about a boy facing coming-of-age questions about love, sexuality, complexes, and other troubles.

(Source: Ganma!, translated)

Himawari-chan, the Little Princess of the school-bag planet called "Girl's Elementary School Star" at the edge of the universe, has come to the Earth to find a husband.
With the help of her maid, Sakura, Himawari-chan will start developing a bond with the earthlings.
and with the big-breast Osananajimi, Kaguya as an extra, the Kawaii Bishoujo meteor love comedy now magnificiently dispatched.

Amamiya Hiroto is unlucky. His life consisted of misfortune after misfortune, culminating in an unlucky death during an incident on a school boat trip, trying to save a girl he barely knew. After death, he met a god of reincarnation who requested that the hundred or so dead passengers - one of them being the girl he tried in vain to save - be reincarnated into another world.

Yet a series of unfortunate events forced Hiroto to reincarnate with even less luck than before, starting with nothing but a tremendous amount of Mana. His second life, far worse than his first, came to a cruel end.

However, upon meeting the god a second time, he was informed that there would be yet another reincarnation - one that had already been set in motion and could not be stopped. Not wanting Hiroto to endure a third life filled with suffering, the god cursed him before he was reborn in the hopes that he would either die quickly or commit suicide.

Hiroto was reborn once more as a half-vampire, half-dark elf. A dhampir. Not wanting a fourth life, he is determined to live this third life with the only things remaining from his previous lives - Death Magic and his enormous Mana pool.

Misato Takuma, who has a crush on a classmate, is suddenly kidnapped at the infirmary when he comes to have a second checkup. When he wakes up, he's strapped to a bed and forced to do "something" by a beautiful nurse he doesn't know! It's a mysterious hospital where men are locked in an isolation ward and managed by beautiful women! Where the hell are we? And what is the purpose of these beauties? And then the love game between a woman and a man with their lives on the line begins!

By the time he opens his eyes, Kubota Tamotsu (34 years old) has been reincarnated into another world. Moreover, as a 6 years old slave with “Level 1 Barrier” skill. To surpass his limitations and become a powerful Barrier master Kubota begins a hellish training, full of obstacles and struggles. — From “Let’s Become a Novelist”, a new other world fantasy starts!

A story of a young man who lacks a sense of reality after being dumped by his lover. He was visiting a seminar on cultural anthropology with his fellow classmates when he discoveres an ancient wall painting, which transports him to the past where mammoths dominated the world.Action

When a series of animal bodies that rot away after a single night begin appearing in a remote mountain village, Inugami, a detective from Tokyo who specializes in the occult, is called to investigate.

While working the case, he befriends a strange boy who works in the field every day instead of going to school. Shunned by his peers and nicknamed "Dorotabo" after a yokai that lives in the mud, he helps Inugami uncover the truth behind the killings - but supernatural forces are at work, and while Dorotabo is just a nickname, it might not be the only thing about the boy that isn't human.