Having survived an isekai for 17 years, 34 year old Ojisan (uncle) returns to modern day Japan. Takafumi, Ojisan's nephew, now gets to witness what throwing a die hard Sega fan into an isekai for 17 years does to various things and people, both past and present.

I was a public official who worked part-time to survive. I was knocked out by a speeding car while making deliveries in the middle of the night. I have a strong memory of dying prematurely in a hit-and-run. “…I’m Jo Hwi?” At some point, I became the second son of the collapsing Jo Ga-cheol Clan. This family has neither the authority to drop a flying bird nor the power to carry out one’s will. There is only an enormous amount of debt that can annihilate the entire family. There’s only one way out! “Father, please pass the Jo Ga-cheol Clan on to me.” The story of a successful modern man who has to utilize all the knowledge and experience of a public official begins now!!

When I woke up, I had been reborn as a baby. My mother passed away and I was neglected by my father. Even though I was born in a Marquis family, my life started on HARD MODE. But I won’t be discouraged. I will eat well, sleep well, move a lot, get whatever I can get and live happily.

But for some reason, a lot of incidents happen. This is a story of a little girl with the power to create barriers in a world where the Hollows and Humans are in conflict. She gets other people involved in those incidents and becomes happy.

Web Novel: https://ncode.syosetu.com/n2421eu/

A character with extreme difficulty and the worst performance, Baek Yu-Seol was considered tr*sh in the game because he couldn’t use magic in a fantasy world where everyone else could.

However…

[Due to the wrong ending, 90% of Aether World has been destroyed.] [Please reach the ‘True Ending.’]
Suddenly, those words echoed in my mind before I was transmigrated to the Aether World.

[You can use the skill ‘Flash’.]
“Why did I possess this character?”

Flash was the only magic skill I was given.

Surviving in Stella Academy where many genius mages ran rampant, I became the notorious Flash Mage.

I had been abroad to do medical volunteer work, when I was swept up in a civil war. I was killed by a rebel soldier, while taking a bullet for a patient. But when I finally woke up, I had become a child?!?

And in front of me stood a destroyed carriage and a group of oddly dressed people, who were unconscious!

“It’s just like a Murim world.”

As I hurry to perform first aid in an attempt to save even one person, I realize that this world is that of [The Supreme Demon King], a Murim novel I’ve enjoyed reading.

After meeting the rescue team of the ‘Three Great Doctors’, I found out that one of the person I saved was the protagonist of this novel, the future Demon King ‘Yeoharyun’!

“Hey, since I’m indebted to you for saving me, call me ‘hyung’.”

For saving his life, I become sworn brothers with the future Demon King, and Baekrineuison, one of the most knowledgeable people around, recognized my potential and took me in as his disciple. This is the story of how I became the greatest physician in Gangho!

As a self-professed no-lifer, Yuri idles his days away in front of a computer. This all changes the moment his life in Japan comes to an abrupt end and he finds himself reborn in the strange new world of the Shiyalta Kingdom. His new life includes everything he once lacked: loving parents, a comfortable home, and a promising future breeding and raising birds on his dad’s ranch. For centuries, the kingdom he now calls home has enjoyed peace and prosperity, shielded by friendly nations that, like Shiyalta itself, were established with the collapse of a once-great empire. War is a distant problem, relevant only to Shiyalta’s ruling families whose warriors periodically set out to join the fighting upon massive birds trained by Yuri’s dad and others. But this peaceful existence can’t last forever. Something rotten lies at the heart of the kingdom, and it doesn’t take someone with Yuri’s exceptional intelligence to realize that those distant battles will only remain irrelevant for so long.

Balud Cornelius is the son of a noble of the Mauricia kingdom and inside him also dwell the souls of the stingy warring states commander Oka Sadatoshi and animal ear otaku high schooler Oka Masaharu. With these 3 souls in a single body, he can exhibit extraordinary abilities when it comes to combat or managing the domain.

Anne-Sophia, the Princess who remembered her previous life at a young age, as well as her old self’s intense love of magic, set off to live out her fantasies in this fantasy world.

One day, during a magical mishap, she stumbled upon a scene where her brother Algard was breaking off his engagement to his fiancee, Euphilia.

What nobody could have foreseen is that this strange meeting would end up changing the course of history.

Katarina Claes, the eight-year-old daughter of a duke, recovered her past memories when she was hit on the head by a rock. In a feverish nightmare, in which the prince's fiancee was determined, she have realized that this exactly like an otome game from her previous life.
So, she have turned into a villain that interferes with the romance of capture targets—if the heroine got a happy end, Katarina would be exiled, but if the heroine got a bad end, Katarina would be killed.
With no happy ending waiting for her at the end of the road, Katarina somehow have to avoid destruction and reach old age peacefully!

The world was destroyed, consumed by death and despair. And in the midst of it all, one man fought to the bitter end — the Sword God, Karselian Le Vandayan.

But then, as if guided by fate, a door to another world opened. This time... it was Earth — a world that hadn’t yet collapsed.

There, monsters have begun to quietly emerge, while humanity lives on, blissfully unaware of the impending catastrophe.

This world hasn’t ended... But the moment they let their guard down, the nightmare will begin anew.

Ataru, a young man who lost his life in an unfortunate case, receives three special powers from God and reincarnates into a different world. The strongest gun, the ability to create bullets freely, and the ability to see everything called "magic eyes". Atal, who is the only gunner in this world, casts himself into a supreme supple adventurer guild with the beastman girl Caro who is rescued from slavery and takes on Atal. The sniper's up-and-coming hero who eliminates any enemy with a single blow, opening from here.

A young man wants to marry the mothers of the hero's party—

As a member of the hero's party Ceres, the main character, set out to defeat the demon king.
But one day, he was suddenly dismissed by the hero, and he had to leave the party.
All alone, Ceres sought to find a domestic slave to take care of him. What he saw at the slave market was Ms Shizuko, the mother of the hero, sold as a slave—??

The unreasonably expelled young man's Isekai mama harem is born!!

I reincarnated into the "Villainess Eumiella" from an RPG Otome game. In the main story, Eumielle'as merely a side character, but after the ending, she reenters the story as the Hidden Boss, a character on par to the Heroes with her high stats!!

Lighting a fire in my gamer's soul, and taking advantage of being left on my own in my parent's territory, I train! Train! And at the end of my training...... By the time I enter the academy, I managed to reach level 99.

Though I had planned to live out my days as inconspicuously and peacefully as possible, soon after entering the school, I'm suspected by the Heroine and Love Interests of being the "Demon Lord"...?

A popular Web novel of seeking a peaceful life, a fantasy story of the strongest villainess!

Atobe Arihito is an intense workaholic thanks to his slave-driving boss, the beautiful Igarashi Kyouka. En route to an office vacation though, their bus gets into an accident, killing Arihito instantly.

His soul is transported to the fantasy world of “Labyrinth Country,” where he’s reincarnated as a “dungeon seeker”! Trying to join a guild and pick a job, he’s surprised to run into Kyouka, who also died and has chosen the job of “Valkyrie”! However, he rejects joining her party and decides to become the rare support role of “Rearguard”! But will he be able to find a party in time?

Kitase Kazuhiro is an ordinary salaryman who always leaves the office on time. Though this is Japan, so perhaps he's not really ordinary after all. What's truly strange comes after that; Every night, he takes a shower, changes into his pyjamas and has a good night's sleep. Then he dreams of a fantasy world, and only wakes up when he dies or sleeps in that world. One day, he's killed after stumbling onto a dragon's lair. "A nightmare", he sulks, until he finds his elf friend in his bed.

Curious to see an elf waifu experience daily life in Japan? How's it like to walk with every man's fantasy on the streets of Tokyo? This manga is for all you elf lovers out there!

Alba is happy living a quiet life deep in the mountains... until the day he accidentally saves a beautiful girl — an act that shatters his plans completely. As fate would have it, this girl is one of the key characters responsible for his death in the game's original story! Now dragged into the elite academy where the game unfolds, Alba must dodge danger at every turn if he wants to stay alive.

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!

The middle-aged man and airsoft enthusiast Daisuke Koga is summoned to a different world on his 40th birthday. Given the ability to turn airsoft guns into real guns, Daisuke must save the other world while traveling back and forth between reality and the fantasy world. Alongside female swordsman Rena, Daisuke becomes the only gun user and dominates in the fantasy world after work!

Crushing a scumbag for a single moment gives momentary satisfaction, but lifetimes spent crushing scumbags provide lifetimes of continuous satisfaction. Su Lüxia, our female lead, transmigrates into other worlds with the Second Female Lead Counterattack System, and uses elaborate schemes and tricks to beat up countless cheating bastards and bitches.

Su Lüxia: "Only a cheating bastard's tears of remorse, and the pained moans of a bitch unable to get what she wants, bring me solace."

System: "Has my host tapped into her humanity today? Nope."

First among the ten martial emperors, Peerless Martial Emperor Gu Fei Yang met his demise in the Tiandang mountains. He was reincarnated fifteen years later, as Li Yun Xiao of the Tianshui Nation, and thus began a heaven-defying battlefront with the countless talents of the current generation. Martial arts of the nine heavens and ten divine realms. From then on, the whole world was set ablaze.