Tsuji Motochika is a guy who loves little girls. Yuna looks like a little girl, but she's actually older than Tsuji. Also, she likes much older men.

Together, they make an agreement to show each other's greatest desires - Tsuji's father and Yuna's little sister - and in the process, learn that age is only a number.

Aoba, the hero who has walked the path of the shade. In order to push through the unyielding "feelings", he will jump into the world of mixed martial arts "MMA"-!!

The manga centers on Yuru, a boy who lives in a remote mountain village, spending his time hunting birds and being one with nature. But one day, Yuru's younger twin sister Asa is called to serve in the jail at the heart of the village, her duty also confining her there. Yuru slowly unravels the unnatural mystery hidden beneath his quiet village.

Emperor Ludis, Unfortunately passed away due to "Emperor's mark" (which subjugates "Magic Beasts"). 1000 years later , Ludis reincarnates into a person who should have died. Ludis, chained by rules in his previous life, will become an adventurer and travel around the world to live freely. He may appear to be an ordinary adventurer but behind the facade he is the strongest magic beast tamer. Together with his companions, he begins his wild journey in another fantasy world full of magic beasts.

Original Web Novel: https://ncode.syosetu.com/n1188ff/ (JP)

Some children are raised in the hands of Kwak No, After establishing a Disciple-Master relationship, the children dream of their own dreams by practicing martial arts and walking in that path to become masters. In order to make a living, Kwak No always had to leave his seat, and Seon-yu, the eldest of the children, has to take care of the Children, and He’ll be the Great Master.

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.

The perfect but slightly scary student council president, Ookamigawa Runa, also known as "Wolf Senpai"
And the incompetent vice president, Tsukiyama Yuuga.

The two are complete opposites in every way.

Except for one thing: they each have a secret side to them.

One day, Tsukiyama finds out about Wolf Senpai's true side through a secret part-time job...!?

The descendants of mankind, born in the labyrinth and raised on the milk of monsters, possessed special strength and strong bodies. When they returned to earth, mankind referred to them as dungeon babies. Among them, Kim Jinwoo was born in the deepest labyrinth.
“I never tried to become strong, I just wanted to live.”
From the lowliest excavator to the king of the labyrinth, his life story is now unfolding.

High school girl Sayama Umi is placed in the care of the neighboring Hiroi family while her mother is away on a long business trip. The Hiroi household is home to Shoya, an eight-years-older figure she admires, and Umi's heart races at their long-awaited reunion. But the Shoya she encounters is completely different from the one in her memories...

A faintly sparkling cohabitation story about meeting changed memories once more.

Amae Yuuya, an office worker in his third year of employment, is completely exhausted by the daily grind. Then, for the first time in seven years, Yuuya meets Aoi Shiratori, a girl eight years younger than him who used to live in his neighborhood. She had grown up to be a beautiful JK girl who was good at housework, and she said to him,

“Yuuya-kun, would you like to live with me under the premise of marriage?”

Aoi desperately wants to live with Yuuya, her first love. Yuuya, who is puzzled, agrees to live with Aoi as a guardian for the time being, but Aoi’s aggressive approach makes him very nervous inside.

Thirteen years ago, suddenly the Villainous Army of evil appeared in their gigantic floating castle 10000 meters in the sky to invade Earth! The villainous army have reviving capabilities that make them immortal, making them a serious threat to humanity. To protect us against these invaders, the Divine Dragon Rangers, the Dragon Keepers, wield their miraculous powers and their weapons, Divine Tools, and continuously fight for our safety! The assault of the Villainous Army! The vigilance of the Dragon Keepers! Will they succeed in their conquest…? Find out in the action-packed superhero series of a lifetime!

From Haruba Negi, the creator of 5Toubun no Hanayome.

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.

Shinichi Kudo is a high-school student who, by using observation and deduction, is good at solving mysteries. While investigating one, he is caught by the criminals that he was watching and forced to take an experimental drug. Leaving him for dead, the criminals disappear. Instead of killing him, however, the drug turns Shinichi into a little kid.
To preserve the illusion of his 'disappearance,' Shinichi adopts a new name based on his favorite author (Arthur Conan Doyle) and becomes Conan Edogawa. Ran, his (actually Shinichi's) childhood friend takes this little boy under her wing and brings him to her home.
Conan now lives at a detective agency run by Ran's father, but his mind is as keen as ever and he continues to solve mysteries... always allowing Ran's father to take all the credit.
As far as everyone's concerned, Conan is just a little kid anyway... even to Ran. This is *extremely* frustrating to Conan since nobody will listen to a 'little boy.' Despite this, Conan has a mission... to find the criminals who did this to him and get the antidote to that drug.

Note: Won the 46th Shogakukan Manga Award in the shōnen category in 2001.

Mysterious alien life-forms invade Earth! Most of humanity is wiped off the face of the planet. John, his sister, and the remaining survivors hope to find a new world to inhabit... But one day, they're targeted by aliens again! (MANGA Plus)

Helmut was a child who had been abandoned in the Demonic Beast Forest at birth.
Raised by Demonic Beasts, the first human that he met was the Sword Saint Darien.
Little did Helmut know that the chance encounter would soon shake the foundation of his fate…

“Grow stronger If you want to get out of here.”

The boy who’d lived like a beast was thrown into the human world!
He possessed overwhelming swordsmanship, outstanding looks and sharp intelligence, but there was one thing he lacked: humanity.

I am no longer a prey. I am now a predator!

For as long as he remembers, Komi has been shorter than his fellow classmates. He always felt inferior as a result, until he met Obinata - a girl who is head and shoulders above him.

Yes, Asumi Obinata is tall. She’s imposing. But she’s also Komi Amane’s girlfriend. And these two are the happiest kids in the world.

The super-popular oneshot has been expanded to a full series here!

Young Sain Forth has it made; as the famed Holy Knight, he has the people’s love, the respect of kings, and the blessings of a literal goddess. His aspirations lie elsewhere, though. With his assistant Melia at his side, he leaves for an academy in a foreign kingdom, where he is treated as a deviant by his peers. It’s his own fault, mind you—his stubborn insistance on wearing a custom, all-black uniform makes him stick out. He isn’t the only outcast in his class: Alicia, born into the Clan of Light but unable to use anything but fire magic, faces similar struggles, and the two quickly become allies. Alicia proposes that they enter the labyrinth below the school in search of a holy sword, but Sain has other plans in mind: a doom sword. And so, with his friends in tow, Sain ventures into the perilous unknown, driven by a wish to become the coolest, edgiest, most awesome thing in existence: a Dark Knight. There’s just one problem. He can’t use dark magic. Like, at all.

Maeda is a new student in the Teiken High School. He stutters when he's nervous and he's rather clumsy. He gets noted immediately because he hits a teacher during the entrance ceremony. Some clubs search to enlist him as they see in him a force they can use to get even with other clubs. But Maeda is a loner and has only one dream: becoming boxing champion. His first objective is to beat the leader of the boxing club. "Rokudenashi" translates as "good for nothing".
The manga focuses more on gang warfare than boxing.

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!