An 18-year-old poor college student tried to apply for a job as a tutor but his life almost ended as demons' meal. In his last breath, a mysterious woman gave him a strange power. When he opened his eyes he had turned into a demon with a system that will turn him into... A pervert.
Now he must live with his dual identity as a model student named Ethan and an incubus named Damian, while conquering MILF, monster girl, beautiful elf, demon loli which sometimes leads him to complicated relationships.
Other tags : Hiding Identity, Monster Girls, Tentacles, Character Development, Weak to Strong.
*Most of my story has a big harem, I'm not interested in writing a small harem with only two or three girls. The MC is not an arrogant type and doesn't carelessly kill people nor let the others died in his presence. He also doesn't treat his woman as a sex object. Even though this is a harem story, some parts of this story will make you tear up and have some funny scenes.

What do the words Third-Rate Villain mean?
Doesn't every human being possess their own background story?
Just because a game hadn't explored one's background story, does it mean those characters are irrelevant?
In a world where video games come to life, Astron Natusalune is introduced as a seemingly insignificant characteraa third-rate villain with a minor role. However, this ordinary facade belies a haunting past that has shaped Astron into the vengeful soul he has become.
Someone who would do everything for his vengeance.
What will occur if Astron's soul combines with one from Earth? Will he relinquish his position as a third-rate villain, or will he forge a new path?
Driven by a singular purposeato avenge his sister's tragic death and bring justice to a cruel worldaAstron embarks on a transformative journey.
Witness the journey of the Astron as the young boy experiences a profound shift in his own values as he witnesses firsthand the consequences of unchecked vengeance and the true complexities of morality.

Leon and his father, Artorias, are the last remaining scions of a once powerful and illustrious family of lightning mages. After barely surviving an attack that destroyed their home fifteen years ago, they now live in the dangerous Northern Vales, a desolate wilderness far away from civilization. But those who want them dead are strong, patient, and relentless, and it is only a matter of time before they find the two they seek...

Five years after being kidnapped and ens*aved in a city full of Witches, I became the only male Witch in the world!

Wang Ran transmigrated a year into the past when zombies had first appeared in the world.
He initially wanted to use his knowledge of future events to gather resources and then find a reliable Awakened camp to spend his days.
However, to his surprise, he seemed to have also become an Awakened after he transmigrated.
Yet, he felt that his Awakened ability was somewhata|unique. Others gained greater speed and strength, but he seemed to have gained the ability where his blood could cure zombies.
Wang Ran, who was rejected by the survivor camp, could only build his own camp.
However, why was it that he was surrounded by mutant female zombies?
Wang Ran wailed, aSister, I know youare very beautiful, but I cannot take in any more recruits. I am about to be sucked dry.a

aFarming wives in the apocalypse.a Getting a wife is possible. Getting Wives is hard. And in the apocalypse, it's impossible. But what if you have superpowers that allow you to do anything? I mean everything!
___
Rudy was optimistic, handsome, and blessed with knowledge. He topped every exam with minimal effort and got into his first choice university. Growing up in a low-class family, he had to do what it took to be a successful person. So he focused on his studies and aced the university.
When he was in his last year, dozens of famous companies wanted to recruit him. He had a bright future waiting for him. However, he got into an accident on the day of his graduation.
He was left crippled at the age of 23, and all his hard work was in vain. He had to break up with his girlfriend of 5 years, his friends stopped visiting him, and his family was working hard to pay his medical fees.
One night, when he was staring at the ceiling like countless other nights, a mysterious man visited him. He said he was from an organization that was working on the agene experiment.a
The man offered Rudy a chance to live his life again, but if he died in the experiment, he promised to give Rudyas family a huge amount of money. It was a win-win situation for Rudy as he had nothing else to lose.
However, after months of experiments, nothing happened. Rudy was left alone to die in the middle of nowhere. As he was taking his last breaths, he recalled everything he had done in his life, and he remembered all he did was work hard to have a bright future, which he never got a chance to experience.
aIf I knew this would happen to me, I would have lived a better life.a
Left with regret and despair, Rudy died. But when he opened his eyes again, he found himself in his high school. He later learned that the experiment was successful, and he had become an esper with all the psychic abilities.
aI will live every moment of my life to the fullest!a he shouted during the class and dashed out of the classroom.
However, there was a catch. The world was different from what he used to live. It was a post-apocalyptic world in a parallel universe, where his superpowers were going to help him dominate the world.

[Ding! Dragon Monarch System has been activated.]
Aditya finds himself in the body of a 19 years old dragon. Aditya learns the misfortune fate of the former Aditya. Being a man from the 21st century, Aditya decides to change his fate.
Being married to the 7 goddesses of this world, Aditya walks on a path to prove himself to his wives and to his family.
aGoddess of Wara
aGoddess of Alchemya
aGoddess of Wealtha
aGoddess of Wisdoma
aGoddess of Lusta
aGoddess of Musica
aGoddess of Naturea

For others it takes dying and reincarnating for them to get a system but what happens when you get one without dying.
Aron Michael is an average student set to graduate within a week, but he was expelled for a random reason. Due to that he had a heavy student dept and no diploma to help him earn the money to pay it back. But one day he got a system that called itself the [Advanced Tech System].
follow the story to watch him develop from your average joe to him being the owner of the largest company in the world.

I got sucked into a novel full of villainesses, and taming them is the only way to survive!

Jacob Steve, an Old Man, died at 116 after living a whole life.
But Jacob always had a dark side, which he always suppressed and hid from others.
However, in the later years of his life, when death was inevitable, he understood there wasn't any point in having wealth, knowledge, or desires if you couldn't have a life to enjoy them.
He became obsessed with fabled immortality and devoted his reaming life to extending his fleeting lifespan, but just like any other failed.
However, he mysteriously got another chance at life and found a way that led to fabled immortality.
But he was also forewarned that the way led to it was filled with blood and darkness!
In the end, Jacob chose it anyway with no way of going back, and it was also the start of his suffering and his icky, brutal journey toward the 'Immortality' he wanted so badly!

Died a Hero, Reborn as a Demon...
The strongest Hero in the world killed the Demon King, the most powerful demon ever to appear on Earth. He achieved something which no other hero could ever do.
But alas, the Hero never expected his own girlfriend, his own friends, and the organization he trusted to suddenly turn against him and try to kill him.
It was the cruelest blow he was ever dealt in his life.
He still didnat give up and tried to stand his ground, but they had come prepared, and he was caught unawares in their trap. He fought to his death only to find himself transmigrated into a demonas body!
But who would have thought that he would be the husband of the Demon Queen!
However, life as the royal consort was not easy at all. So read to find out how he is going to overcome those trying to step on him and finally get his revenge.

When Orion is mysteriously transmigrated into a primitive world where sex and other goods and services can be bartered for, he is determined to make the most of his second chance at life.
But as he delves deeper into this dangerous world filled with temptation and magic, Orion must use his wit, charm, and thirst for adventure to survive and make the most of his second chance at life.

16 years old-- most boys would be falling in love, as their hormones all rise to unprecedented levels. Most boys at Riley's age would have dreams; dreams that will slowly grow into passion. Riley, however, at age 16... killed the world's number 1 superhero.

The Third Dimension is collapsing. The Fourth Dimension is descending.
First it seemed that only technology would evolve, but who knew the world itself could too? It wasnat as simple as climate change or tectonic movement. No, the fundamental laws of physics that governed everything were changing.
Leonel was fairly lucky. His family was decently well off, his father loved him enough to brew vomit inducing nutrient rich smoothies every morning, and this was both the day of the National Championship and his 521st confession to his dream girl, Aina. As his father always said, nothing was more important than respect and persistence.
Unfortunately, everything changed that night. At the after party of ages, the world reached a saturation point and an apocalypse descended.
Abilities awakened. Sub-Dimensional Zones opened. Invalids rampaged through the Earth like a virus...
Those who could evolve would have a slim chance for survival. Those who couldnat would die.
This novel will be a unique spin on the dungeon\/system genre. Dungeons won't be dungeons and the system won't be a system... Take a look to find out what I maen :)

I claimed to be better than the MC. An Eldritch entity decided to put my claim to the test and reincarnated me into the world of the novel I read. But, Iam not alone. There are five other reincarnates?
Wait, wait, wait! Why is the MC a regressor now? That wasnat part of the script!

The human race is fending off the assault of the thaids, strange monsters evolved by animals occupying most of the earth's surface.
Because of the monsters, society has evolved into one based on individual fighting prowess; Erik is an abandoned young boy living in such society with the most useless of the powers.
Everything changes when his father returns home, bringing something he would have never expected.
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Dual cultivation isn't a choice; it's a necessity.
After being struck by a truck like most lucky protagonists (or unlucky ones), Vaan found himself transmigrated into the body of an orphan in the world of witches and demons.
However, they didn't always exist.
Demons terrorized the world ever since the Gehenna Realm descended over 300 years ago. but along with them, came mana, giving birth to witches to combat these demons.
Since then, the world of men was dominated by witches, establishing the seven witch kingdoms, which safeguards at the forefront of the demon invasion.
In order to survive in the matriarchal society of the witch kingdoms, Vaan, like all other men who cannot use magic, had to learn how to service the witches to survive.
Nevertheless, it did not come without its own benefits.
Years of research have led the world to the discovery of intimacy between men and women could increase the witches' mana absorption.
But at the same time, men could absorb some of this mana to improve their physique and lifespan.
Thus, since then, an intricate relationship was formed between men and witches in the red-light districts. Love became casual, and dual cultivation is common.
As a prodigy in the art of pleasing women, Vaan lived a smooth two years since his transmigration as an orphan.
However, everything came crashing down in a heartbeat one day when his life was nearly taken, and Lady Eniwse whom he served went berserk.
Even so, that was not the end.
With the awakening of the Witch Hunter System, watch how Vaan takes on the world and becomes the lord of witches.

In a world where Magic reigned supreme, Ruling over the Mythic Elements were the Holy Magicians of the Sacred Elements.
A young prodigy, Gabriel was selected as the Holy Priest in the Church of the Magic of Light. He was the youngest mage to awaken the most coveted element of light; his future was supposed to be bright... But one day, he disappeared as if the darkness had swallowed him up.
As Gabriel walked on the thin line between life and death while fighting for his life, something came in his life... Something that was going to change his life and the world forever...
Step on this unforgettable journey of light and darkness that transcends boundaries of space and time like never before...

Carter Williams was your typical twenty year old loser. After a fight in the street leaves him unconscious he wakes up in the body of a young dragon in an entirely new world.
Armed with a system to assist him and two beautiful wives to support him, Carter vows never to live his life hiding in the dark again as he seeks the title of dragon king.

Note: There's no magic in this novel. This was previously in the Realistic Fiction genre but it's not included in the choices. So I picked the closest one to it.
Onoda Ruki is just your ordinary high school student. He strived for being the Classmate A who's unimportant to the story.
Despite being the Classmate A. Onoda has a secret desire which he always had ever since young and that was to steal each and every girl from their guy.
Join him as he entered his high school days as he conquer and steal every girl he sets his eyes on. And along the way, the growth in his character and those around him.