There’s a legendary Bishoujo Game that has become popular among Japanese gentlemen.

Its name is “ Magical★Explorer” or Magiero for short.

The game’s protagonist has a cheat-like power with12 different beautiful heroines to flirt with, including additional 12 heroines from the DLC, a harem of 24 beauties. I have become that protagonist!………………Not. Instead, I have become the third-wheel character who always laughing like an idiot next to him.

Of course I was in despair at first.

Of course. If I am the protagonist I could have all 24 heroines for myself along with unparalleled cheat power. However, since I am the third-wheel there’s no heroine that would lay their eyes on me.

But now I couldn’t care less about the protagonist and his heroines. Why? Because I discovered magic. While I was using it, I have become interested in it. I want to master it. I want to become the strongest. Thus I have decided.

I would abandon half my role as a protagonist’s friend to train my magic and then I would beat the hell out of that cheat who can solo the Demon King.

In the Edo period, there was a shrine maiden called "Itsukihime" in the mountain village of Kadono. Jinta, a young man who acts as the shrine maiden's guardian despite being a stranger, encounters a mysterious demon who speaks of the far future in the forest where he went to defeat it. From Edo to the Heisei era, this huge Japanese fantasy series follows a demon man who travels through time while continuously questioning the meaning of wielding a sword.

I reincarnated as an evil god.

Ira Takuto succumbed to illness at a young age and ended up reincarnating in a world that resembled the strategy simulation game, 『Eternal Nations』, of which he loved playing when alive. What appeared in front of him was Atou, a girl belonging to the evil civilization that he used to play as, 「Mynoghra」. The two of them decided to create a new country in this world once again.

Kaito Odagiri is a normal fifth grade boy who can hold his own in a fight and loves to show off. This attracts the attention of Makoto Kaibara, a boy at Kaito's school who reveals to him that he can use magic, but he needs Kaito's help to protect the peace of their town.
Kaito jumps at the chance of being a magic-wielding superhero, but his excitement turns to horror when he realizes that he'll be protecting the town dressed as a typical magical girl under the name Thrilling Pink.
Although initially reluctant, Kaito soon discovers that there's more to being a magical boy than simply looking cute in a skirt.

Am I "necessary" in this world? What is the true nature of the person called "Muzina" who flies in the sky with a sword on her back in the midst of ordinary life?
What is man, what is society, what are human rights, and what is happiness?

Sequel to Re:Zero kara Hajimeru Isekai Seikatsu: Dai-3 Shou - Truth of Zero.

Constance, the daughter to a Viscount whose only value is her honesty, and Scarlet Castiel, the most reviled villainess of the era who was sentenced to death ten years ago. When the two people who were never supposed to meet encountered one another at a night party, the story that should have ended with Scarlet's death began anew.

Although their relationship only began out of mutual interest, they soon became true partners in an effort to unravel the mysteries of a grand conspiracy borne out of the past, that still has a vicious grip on the present.

Suzuki Saburo is the typical isekai MC. A high school boy who started to get into cooking after getting an injury during baseball, he suddenly found himself in another world one day. With the only thing on his person being his custom knife, he wandered a desolate prairie for three days before falling unconscious.

When he woke up, he found that a nomadic tribe of elves took him in. However, there’s one big problem — the tribe has terrible cooking. Can Saburo help teach the nomadic elves the true meaning of deliciousness?

The end of the world is coming, and human beings have awakened their superpowers and fought against the monsters in the towers. However, there is a strongest BOSS sitting at the highest point of the tower – Demon King Jiu Ming. He is an insurmountable barrier for humans. One after another, the brave men always thought that they were the protagonists in the story, but the halo of the protagonists never came to them. When the protagonists lose their protagonist aura, they no longer are the protagonists.

The hero, Fried, confronts the demon lord with his student, Lyle. Fried killed the demon lord after a ferocious battle. “I'm going to put an end to this war!” Just as he was about to finish off the demon lord, he is betrayed by his student who attacked from behind. Fried, who was supposed to be dead, wakes up next to a demon girl who calls him the demon lord for some reason. It seems that Fried has risen as the new demon lord and will now have to protect the demonkind under his command while fighting his former comrades

Webnovel Link: https://ncode.syosetu.com/n0087ep/

The engagement between Scarlet, a noblewoman from a ducal family and the Second Prince Kyle was suddenly annulled during the ball.

She had been falsely accused of harassing a girl called Terenezza, daughter to a baron, whom the Prince doted on heavily.

Condemned by everyone around her, forced to burden all manner of crimes, she finally decided enough was enough.

“Before I leave here, may I ask for one final thing?”

As the crowd threw their boos and jeers, and that good looking guy flung his insults──

Her palm spun like a drill and the ballroom floor was stained with blood.

The internet is full of rumors about the Neet and Hikikomori genius gamer siblings Sora and Shiro. The two go as far as to refer to the world as a "shit game", but then one day a young man calling himself "God" summons them to a parallel universe. There, God has forbidden war, and "everything is to be settled with games". Yes, even the national borders. Driven into a corner by other species, the 'human species' is down to its last city. Can Sora and Shiro, these related failures of society, become the saviors of humankind in this parallel world?

From ANN:

Guts, known as the Black Swordsman, seeks sanctuary from the demonic forces attracted to him and his woman because of a demonic mark on their necks, and also vengeance against the man who branded him as an unholy sacrifice. Aided only by his titanic strength gained from a harsh childhood lived with mercenaries, a gigantic sword, and an iron prosthetic left hand, Guts must struggle against his bleak destiny, all the while fighting with a rage that might strip him of his humanity.

Warning: This manga is for mature audiences only, since it has sexual content and graphic violence (gore, blood, rape, etc). Definitely not for the weak hearted.

The 1988 Prototype chapter won a prize at the Comi Manga School Miura attended and the main series won the Tezuka Osamu Award for Excellence in 2002.

A male engineer transmigrated into another world, and became a prince. This place strikingly resembles the Middle Ages of Europe, but at the same time, it seems kind of different? Witches truly exists, and they even possess magic powers! Magic powers are productive forces! Save the witches, liberate the productive forces! Open map, fight demons, break conspiracies, climb up the science and technology tree, and open the path of hardcore ‘farming’!

Lady Rosentine Arzen was born with the ability to see ghosts, an offense punishable by death under imperial law, and something which threatens to ruin her family. So when Rosentine learns of a plot to poison the imperials, she goes undercover as a vagabond sorcerer to save Prince Charteris Kartazen, who promises to protect her family should she solve the mystery. But who would want to harm the prince? The palace teems with danger, but it’s Rosentine’s own secret that could prove fatal to her.

Yuna, a 15-year-old girl, started playing the world's first VRMMO.
She has earned billions of yen in stocks and confines herself in her house playing the game without going to school.
Today, a major update has arrived and she obtained a non-transferable rare bear outfit.
But the equipment is so embarrassing that she can't wear it even in the game.
Furthermore, when she answers the survey regarding the new update and relaunches the game, she appears in an unknown forest in the bear outfit.
Where is this? Email from God? A different world?
If she wears the bear outfit she's a cheat, if she takes it off she's a normal girl. Her adventure starts just like that. Yuna began doing whatever she wanted.

Asuma Sudou has always been a proud pervert, but he's sworn to give that up to chase the girl of his dreams. Having received a special invitation to enter the same all-girls school as her, he's planning to live his romantic youth to the fullest. But those plans are cut short when it turns out the school is a front for a secret organization dedicated to battling kaijin-monsters created when people succumb to their murderous impulses! The girls of the school fight using the relics of defeated kaijin, but when the bloodthirsty instincts sealed within threaten to overwhelm them, Asuma is the only one who can bring them back to their senses!

(From: Yen Press)

In modern Hokkaido a brown bear has appeared near an elementary school, so a member of the local hunters' association is dispatched to exterminate it. However he gets killed by the bear and wakes up in a fantasy world, armed with only the Remington M870 shotgun he had when he died.

Rust worked in the alchemist association. He specialized in basic research, but the current president, a former government official, failed to understand the importance of the basic research department and slashed its budget. To make matters worse, he was made to transmute basic materials for alchemists of other departments.

But one day, his budget for the next term was reduced to zero, and the president announced the basic research department was disbanded.

The same day, a friend from his academy days invited him to help develop her new dominion in the borderland, and Rust, seeing no future for himself in the association, decided to quit.

Rust was actually one of the greatest alchemists on the planet. The basic materials he transmuted were of the highest quality, and could not be acquired anywhere else. These high quality materials covered a lot of gaps in the association, and Rust’s departure made a big mess.

Feeling liberated after leaving the association, Rust worked in the borderland with a newfound enthusiasm and vigor.

An official manga adaption by Butcha-U of a Light Novel by Munmun with Character Designs by Mizuryu Kei.

The 30-year-old Satou Tarou accidentally dies and gets transferred into another world by god. After receiving a curing cheat ability, Satou Taro changes his name into Tauro and begins a fresh life.