I was supposed to be dead, but when I woke up, I was a rat!
...or, more accurately, I became a virus and infested a rat!!
The more I infect, the more bodies and skills I get!
I'm going to cause a pandemic in this other world!

Web Novel (Japanese): https://ncode.syosetu.com/n9004es/

The main character and “anti-hero”, The Rapeman, is a high school teacher by day and dispenses his surreal brand of “justice” at night under the business “Rapeman Services”, which is co-run with his uncle, a former surgeon. He uses rape as his weapon. The business' motto is “Righting wrongs through penetration”.

Clients call on The Rapeman to handle cases such as the revenge of a jilted lover, forming parental bonds through a traumatic crisis, making disruptive co-workers more docile and other things of that nature. When engaged in his night trade, The Rapeman wears a black leather ski mask shaped like the head of a penis but no trousers or underwear. In the middle of a rape, if the woman became unresponsive or appeared to be enjoying the violation, he would use a “special technique” such as “M69 Screwdriver” or “Infinite Loop” to apply more pain to the victim. He sometimes has regrets for the contracts he fulfills, but he always does the job.

The story of a middle school girl trying to find herself in the confusion of adolescence.
Skateboard-loving Ichiri Sanjou, nicknamed "Icchi," may look like a normal energetic kid, but whenever she sees the full moon, she is hit with a wave of emotion she cannot comprehend.
The series revolves around her learning the Afro-Brazilian martial art of Capoeira.

The main character, Takamiya Honoka, is a regular student whose only problem seems to be that he sits next to Kagari Ayaka, the school's #1 beauty. They have never crossed words before, and even a small interaction between them results in her fan club beating him. Yet when a falling part of the school's building is about to send him to the afterlife, it was her that came to his rescue. Except, she was dressed as a witch, using a princess carry to hold him in her arms as she floated on a broom. She continues to protect him using her fire magic until the attempt on his life ends. She tells him it is her mission to protect him, and that now she can finally protect him openly (she used different means to protect him "undercover").

Why was Takamiya attacked, who asked Kagari to protect him, why does she refer to him as "my princess" and what is her fan club going to do to him now that she will be close to him openly?

The protagonist, Masaru, has just inherited a big fortune after the death of his father. However, people are trying to get their hands on it by any means necessary, even if it means killing him. Narumi helped Masaru from being kidnapped after fighting some weird guys. He found out that they're not humans but wooden puppets with amazing strength. After a hard fight, Narumi was forced to admit that he's no opponent for them; and just when he started to think that Masaru would be captured, Shirogane, Masaru's watcher arrives from France with a weapon, the puppet Arlequin. Here, begins the story of Karakuri Circus.

You can't leave this island until you've killed 100 people. The most deadly survival game begins on a solitary island where desires swirl and only the strongest survive!

Crow, the loyal butler of a villainess, realizes through a series of chance events that he has in fact been reincarnated into another world.

With a new perspective on life, he realizes just how badly he's been treated by this haughty, egotistical and prideful noble lady he calls his mistress until now, and boils with rage at the injustice.

However, after deciding to take revenge on her in a risque way, he comes to realize that she's a lot easier than she looks...

This is a story of how a reincarnated butler tames his villainous mistress in lustful ways, but ends up making her truly happy.

Sho and his friend, Tetsuro, stumble upon a strange orb-like mechanism, the Guyver Unit, in the woods. It physically bonds with Sho and turns him into the alien soldier, Guyver. His mission is to protect the Guyver Unit from the Japanese corporation known as Chronos. They are after it and two other units just like it. To retrieve the object, they send out vicious monsters known as Zoanoids. So no one is safe in Sho's life; not even himself.

After saving the world, the strongest hero who has no place to go anywhere · Leo. Power that is too strong can not enter the peaceful world …… Such a place of employment where he arrived – the former enemy, the Magus army! The 2nd Kakuyomukon.

The story is set in a Japan that is ravaged by plague-like rust, and details the journey of the strongest mushroom hunter Bisco Akaboshi and young doctor Milo Nekoyanagi and their search for the legendary medicinal mushroom “Sabikui”, believed to be the cure for the rust.

Wimpy Sena Kobayakawa has been running away from bullies all his life. But when the football gear comes on, things change--Sena's speed and uncanny ability to elude big bullies just might give him what it takes to become a great high school football hero! Enjoy all the bone-crushing action and slapstick comedy that this heartwarming coming-of-age story has to offer.

Henry Morris was an 8-circled wizard who was a legend- one of the founding fathers who helped his friend become the king of a unified empire. After the son took over the throne, Henry was executed with the false accusation of leading a rebellion against the empire. He then wakes up in the body of young Henry Morris, the eldest of a baron family, who also happened to have the same name. Henry turns his life around by again relearning magic and also swordsmanship in order to become the first magic swordsman, all for the sake of revenge.

Good for nothing Yoo Hobin is always bullied by students who feel superior to him, yet he ignores them as his life is all too difficult already. However, an unintentional incident ends up turning his life around. He becomes famous through a viral video that he didn't even intend to upload! Everything is perfect! He instantly becomes famous and starts earning money from the accidental video he uploaded.

But since it was unintentional, he is unable to reproduce it. Fueled by the potential money to be made and the sudden change of popularity, he then plans to make more captivating videos that people will find interesting and help him gather more subscribers… However, he cannot accomplish any of that unless he learns HOW TO FIGHT.

From Population GO:
The manga adaptation of Gundam 0083. Years after the One Year War ended, in hopes of resurrecting the Principality of Zeon forces, Anavel Gato (also known as the "Nightmare of Solomon") steals a Gundam Unit 02 from the Earth Federation Forces. In the heat of battle Kou Uraki enters Unit 01 to confront Gato.

In 1988 an enigmatic explosion which has happened in Venezuela caused some mysterious case called "Lost Life Phenomenon". Indiscriminate murder, mass destruction, vanishing of an entire city... Some who got involved in the case say they saw a giant... Fast forward to 1991 in Japan. This is a story about girls who end up piloting gigantic humanoid weapons called "JINKI" fighting against their fate.

This manga started out in 2002 and had 9 volumes published, the "Complete Edition" came out in 2011 and had 3 'large' volumes instead, JUM will be doing the latter.

The island of Eldias, where one wish is said to come true after conquering seven dungeons. On that island, where adventurers gather and compete with each other, there is a boy who is a level 1 baggage handler. The experience he needs to level up is ...... about 100 million!? Despite the tremendous numbers, which make everyone feel sorry for him, the boy uses his "never die" ultimate skill in surprising ways to pave the way to the strongest!

Kang Hyunmoo is a dirt-poor man whose dreams of becoming a hunter were torn apart.
But one day, while he was dreaming of getting rich quick, something appeared in front of him…

[Difficulty: Hell. You are entering the Star of Apocalypse.]
“…What?”

He’ll now be monopolizing items and skills in a future Earth overrun with monsters!

“There’s still more to do, that’s why I need more time”.
With a strong determination, the old man picked up his Rejuvenation potion. The secret of this particular potion is that it rejuvenates the body while preserving the person’s memory. Essentially the fountain of youth. The old man took it anyways and it took a while for the potion to take effect.
--500 years passed…
The man, or young boy at this moment, awoke and found himself in the same world yet different. Nations disappeared, Regression of Civilization, decline in human skills and even basic alchemy has been lost!
Lost Knowledge, Lost Technology! Nothing impossible in the mastery of alchemy!

The brave tale of the peerless Great Emperor Leonard the First was evaluated as a universal truth.
However, in his younger days, before he managed to unify the continent, he was a boorish and clumsy young man, he got his homeland taken away from him and was branded with the infamous name of “Nosferatu”. This is the story of a great counterattack, a great revolt.

Leonard vowed to recover his homeland and truly became a mighty warrior. Several great generals, sages, talented women and geniuses comparable to gods and demons got attracted to the single-minded Leonard and congregated around him. Eventually, they became a great force able to engulf their depraved fatherland and contended against rival countries.

One day, the world transformed into a game.
'Dungeons' and 'monsters' emerged in the middle of cities, and 'players' who had received the gods' authority appeared.

Se-jun Lee, the guildmaster of the Messiah Guild that would bring salvation to the world.
"Let us save the world together. Let's put an end to this nightmare."
The whole world celebrated the hero's appearance,
And I became his comrade.

But...

He wasn't a hero nor a messiah like the world was hailing him.
He was a deceitful hero with the secret ambition to rule the world.
"You did well. If it weren't for you, I couldn't have come up till here."
I lost my life at his blade in the last dungeon.

...or so i thought.

The announcement I heard next to my ear the moment I died.
[Starting the game.]
I returned to the past, back when I still hadn't awakened as a player.

And this time, It's my turn......

To 'hunt' him.