Gio, the demon lord who reigns over the Arobagne Continent, is suddenly summoned to another world in the midst of battle with a hero.... more>>

The beautiful women who welcomed Gio in this unfamiliar world are: Queen Alisa Est, the queen of the Est Kingdom and Duchess Sheila Eunera, the younger sister of the late Est king.

The two of them performed a ritual passed down in the royal family for generations to summon Gio as a hero, entrusting the survival of their country to him in a time of crisis.

Believing in Gio as a hero and relying on his power, they tell him about the ruler of the Kirsch Empire, who is invading the Est Empire and claims to be a mage and the Demon Lord Kirsch.

Intrigued by Kirsch's power, Gio decides to become a hero.

And as compensation for his services, Gio requests the bodies of Alisa and Sheila!

With his overwhelming magic power, he defeats countless enemies, making the bodies of beautiful women as his reward.

The story of lascivious Demon Lord as Hero begins! <<less

The main character, Shota, is an ordinary student.... more>>

When he returned home as usual and opened the door, he was transported to a royal palace in a world he had never seen before.

There, he meets the prime minister, Berlina, who informs him that Shota's face looks exactly like the dead prince.

Shota is asked to become the prince of this country and leave behind an heir, so he decides to have s*x with the wizard Torte and the female knight Eclair to make a baby. <<less

The young boy Felix, who admires the Kingdom’s Knights, is suddenly on a certain day set up as the Kingdom’s crown prince, unanticipating that he would live a life immersed in s*x. There is a queen who is also a mother, there are maids, and an ex-boss female knight, but other cougars approach! The innocent boy’s reasoning is on the brink of destruction.... more>>

With over 50 books at this point, the Harem Series is by far the longest 18+ LN series out there. Most of the novels aren’t directly connected, but they all take place in the same fantasy world.

For now, let’s take a look at very first entry in the series: Harem Castle (ハーレムキャッスル). <<less

The Great Demon King, once on the verge of world domination was betrayed by their disciples and sealed away. They were resurrected after three hundred years.... more>>

The Great Demon King succeeds in impersonating Aquim, a man who is greatly hated by those around him, begins his quest above all, his favorite delicacy, hatred.

Elena, a beautiful woman with black hair and eyes, dislikes Aquim as his valet, but cannot disobey his orders.

Mina, the ice doll princess who challenged Aquim in order to save Elena, but was captured in the process.

And Mina’s best friend Laura.

When the Great Demon King’s finger moves, these brilliant and beautiful women turn into mere playthings. <<less

Originally supposed to be a storeroom, one day Saino Sōhei’s bas**ent suddenly becomes a grand labyrinth. But this wasn’t your average dungeon, rather it was where one could raise their (Love) Level by engaging in le*d acts with girls.... more>>

Whenever Sōhei acquires a special item from his quests in the labyrinth, he in turn uses them upon girls he likes. But as he further delves deeper into the dungeon, will his relationships with girls change as well……?

This is the story of a boy exploring dungeons, girls and sex! <<less

Keith Blackhound was expelled from his Order for selling voyeur photos. After that, he wandered around doing random business by making weird magic items, occasionally scamming people by selling his failed products.... more>>

One day, after being discovered selling fake love talismans, he was chased by Temple Knights, ending up lost in the Elven Forest. Happening upon several elves being attacked by a basilisk, he went to help them, expecting food as reward.

He successfully repelled it with another one of his weird product and, as wished, received food as a reward from an elven girl’s father.

The father turned out to be an influential person in the kingdom and took a liking to him.

He was recommended to be Court Magician by him and was accepted.

His first duty is to teach Elven Princess Naia, who despite being an elf, is unable to use magic. <<less

Shouji, who was born in a poor family, had the qualities of a “yuusha”. ... more>>

However, he was passing his days as a sloth, drowning himself in alcohol and potions(drugs). While relying on only violence to make a living, he encountered a girl who is a talented alchemist, but also mired in debt.

Potions created by this little girl were mind-blowing as it had the highest purity he had seen. It was a product that was worth loads.

He was through with fame and honor. He no longer had the desire to only make money to live as his purpose.

He felt it wouldn’t be so bad to smuggle those potions in the underground world of crime and drugs.

Brewing this restorative item that gets people high, in search of dirty money and comrades for his gang, hanging onto the potions that let him loose, the mad “yuusha” challenged the demons who are hidden in this demi-world. <<less

Shota Iijima picked up erot*c books during his childhood and suffers from severe foreign sister fetish.... more>>

Thereafter, from the years between his age of 12 to 15, he m*sturbated 999 times. For his 1000th round of m*sturbation, he had been transferred to a different world.

And Shota is sold as a s*ave.

A paradise for women and hell for men… Valhalla, the pen*s mansion. <<less

Ayane, a little sister who loves her brother too much, having her love ran amok, confined Tomoya. She doesn’t want their childhood friend, Sayaka to... more>> take him away from her so she took his first time by reverse raping him, and continued to have baby-making s*x in order to become Tomoya’s wife. <<less

A teen is summoned to another world as the Hero. It turns out the Hero can power up women with his cum.

A princess loses her kingdom and is cursed with a magic spell that gives her one of those famous womb tattoos that makes her constantly... more>> h**ny. While journeying with her childhood friend to bring back their kingdom, she has various, well, adventures behind his back. <<less

Crimson and sweet, the bond of the three.... more>>

Betrayed by her lover and charged with a crime she did not commit, Rosa chooses to end her life by casting herself into the river. She survives this, and wakes up in a mysterious garden where she is met by two vampire girls -- Calen and Trill. They ask her to join their cause and let them drink her blood, to which the woman agrees. However, drinking blood turns out not to be such a simple task. Something is needed. That something is s*xual arousal...

And so, Rosa's days of her body being developed in the hands of the girls begin. <<less

A follow on from Satou Kuuki's Love Mary hmanga. I would recommend giving that a read before reading this.

The girl Toudouin Saki has decided to fight as the transforming heroine Hengen Souki Shine Mirage. This is to battle the evil organization known as... more>> Dark Crime, invaders from another world who have finally discovered her weak point as a transforming heroine… …humiliation and shame are about to be piled onto the formerly undefeatable phantom heroine. Will her prideful nobility be shattered as her body and soul are polluted in filthy white cloudy fluids…!? <<less

The series follows a special kind of shrine maiden who specializes in exorcising s*x Gods

A High School Boy without friends, Odamori Tooru reincarnated into a Fantasy World after a bus accident on a School Field Trip. The job that was drawn 『s*avemancer』a Cheat occupation that dominates the minds of other.... more>>

Tooru begins to immediately ens*ave women with that power. However, a Bishoujo of a classmate who similarly reincarnated, Himeno Kirika is a 『Princess Knight』of Justice who has appeared before Tooru…

「Once this happens a Former Classmate, Adventurer, an Elf, a Demon, a Princess, all of these will be collected as s*aves！」 <<less

Poor factory laborer, Todo Yoichi (35 years old, single, working poor) with a certain young man involved in truck incident. Then from the woman who... more>> called herself manager, inform him that he just involved in ordinary accident. With a cheat ability they will be reincarnated to sword and magic fantasy world, but unlike the young man, for Yoichi that didn’t have the existence for his reincarnation in that space he will be reconstructed in former body. There is no cheat ability for him but he get [standard skill pack] or something. Yoichi’s [judgment] [infinity storage] [language comprehension] [return] skill that often coming out in light novel. Working poor is want to break free from life that only working for live, while in order to live in another world with hope that begin swelling in his chest, whatever you think this is the former world…. <<less

When Eiji, an ordinary university student, woke up in the dead of the night due to suddenly feeling a weight on his body, the scene of a young, peerless beauty possessing jet-black hair straddling onto him came to his view.... more>>

「Your blood, I’ll be taking it.」… Announcing thus, that young girl’s sharp fangs bit into Eiji’s nape.

Eiji, who had closed his eyes from fear, felt a stinging pain from his nape; he thought that this was the end, so he resolved himself for the incoming death.

But after some time passed, he became suspicious of the never-coming death, so he opened his eyes only to see the appearance of a fainted young girl whose private place was gushing out nectar fluids.

Well, what will you do in this kind of situation?

There’s no need to even ask. It’s a man’s shame to not eat what is offered to him.

A modern erot*c fantasy about a youth in possession of 100,000 times the magical power within his blood in comparison to an ordinary person, and a vampire princess who craves magic power. Follow as the youth gives ‘special’ training to the vampire princess as she gets accustomed to his overabundant magic power and the pleasure it brings. <<less

Against the Demoncore invaders from the demon world, Heaven’s glittering Saint-Princess Vermillion battles against them. However, she falls to the devil girl Eris’ trap and is forced to undergo a month of fiendish f**anari training. ... more>>

In addition, her mother Celestia is deprived of her freedom and is also forced to undergo the same shameful training as her daughter.

tent**les, slimes, body graffiti and other pe*verted plays such as an on**ole quiz assault the girl’s penises. Will the humiliated heroines be able to resist and become victorious? <<less

This is the first of a three-novel series with two spin-off novels.... more>>

The title describes the basic premise well enough: It's about a boy who suddenly discovers he transforms into a girl whenever his female cousin in danger. <<less

Harem Sister follows Hilcruz, son of Hilmedes from Harem Castle, as a church shelters him and he plots his revenge against the Ishtar Kingdom.

Blum Dilmond killed the demon king and became a hero, and for some reason he was pursued by the Kingdom and tried to escape.... more>>

While spending days trying to avoid the assassins aiming at his neck , he suddenly came up with an idea.

The dungeon which is the home of the Demon king. If it’s there, then he could be safe.

Blum didn’t hesitate and went into the dungeon, but he met an unexpected person. In the deepest part of the dungeon there was the appearance of a mage who helped him fight the demon. Moreover, the subordinate of the Demon King that served as a maid is also there. The name of that maid is Irene.

Since their interests match, they agreed to both cooperate with each other. The demon king is dead and they will personally rebuild the worn out dungeon, they began to work earnestly in order to make a safe haven──. <<less

“I do not trust humans. They’ll betray you without fail.” Aur, the man who had obtained the ability and right to become the Maou at the end of his life of research.... more>>

Summoning the succubus Lilu, he then sets out on creating his own domain, a gigantic labyrinthine dungeon… The misanthropic Maou taking on the world, the curtain rises on a dark harem fantasy! <<less