Dirty oldman isekai

Fantasy harem-comedy begins with a kind-hearted uncle who helps the weak, crushes the strong while doing some consensual seeding here and there.

Realistic take on a modern doctor in another world treating fantasy creatures without magic or modern equipment

From Endless Abyss:

Hatogaya, a man who loved baseball and yet left it, is set up to take the fall for his company and gets sent to prison. A high-school principal and his former coach whose school is about to lose its baseball program bails Hatogaya out. But, in exchange for getting him out of jail, he has to coach the schools not-so-great baseball team.

Kitsune is referred to the marriage between a human and a kitsune - a Japanese word for fox. This is a story about an ordinary human man met and fell in love with a young kitsune girl named Oyome. As a kitsune girl can transform into any form instantly, the life of the newlyweds always full of surprises!

Junpei is happily snoozing away during his sister's ballet recital when a male ballet dancer steps onto the stage. Moved by the strength and skills the dancer displays, the boy discovers his love for this art.

But after a certain tragedy happens, he vows to leave his past behind and turn into the epitome of manliness. What will he do when his love for ballet reignites?!

Every day, the muscular young man Kataoka dedicates himself to building his muscles. At his regular gym, there's one staff member he can't take his eyes off. Her name? Shiina. But what caught his attention wasn't her curves... it was her plump, round belly!?

The manga tells a fictional version of the story of historical Tang China diplomat Wang Xuance, centering on his diplomatic journey from Tang Dynasty China to the Empire of Harsha in India in the 7th century CE. When he comes upon a crumbling empire that is now hostile to him he escapes to Tibet and raises a confederation of Tang, Nepalese, and Tibetan soldiers to mount a raid on the Empire of Harsha.

Takemura wakes up after falling ill for 3 days and realizes the world has been overrun by zombies but for some strange reason he is not being attacked by them! What will he do now with this great power he has?

An owner of a flower shop has a deficit management, then he encounter the forbidden plant cannabis.

Kine Machiko is a thirty-something office worker, who loves nothing more than watching movies and writing her review blog. She hides her passion for movies from her co-workers due to unpleasant past experiences, but she still wants friends with whom she can share her love of movies. What will be the next movie she watches? What dark, geeky secret will haunt her next? Will she ever make any movie friends?

A yandere boy appears randomly out of nowhere.

The power of Valhalla's warriors is called Saga. It is the mighty, magical power born from their achievements and deeds in their former lives. Thus, the more stories and legends of these warriors spread and linger in the hearts of many, the stronger their Saga becomes.

Tae Ho himself was certainly no warrior. However, he was the world's top professional gamer. In the game world of Dark Age, his character, Dragon Knight Kalsted could rightly be called a legend in his own right.

His achievements, his story.

All the accomplishments that the Dragon Knight Kalsted had accumulated in the game!
[Saga: Immortal Warrior] The story of the immortal warrior, Lee Tae Ho, unfolds on the battlefield of the gods, Valhalla. To put an end to Ragnarok, which threatens the world's very existence, a new Saga begins at this very moment.

The manga follows Shindou Yoriko, a 29-year-old Kyoto cigarette shop owner who has a sharp look in her eyes but is actually a kind-hearted person. It may not come across, but she truly loves the city of Kyoto, and is willing to give up some of her time to share that love with tourists and other visitors (as long as they don't get on her nerves).

Suddenly appearing in a different world, it looks like I got caught up in a Hero Summoning. And of course, I’m not the Hero, but it’s another guy……and while being very cautious and scared of the cliche of the cliche-like development, I was thrown into the maelstrom of war……or not.

The Demon Lord? It was defeated a thousand years ago. Hero? He’s just the main actor in a festival. Nobles? They’re kindly taking care of us. The Demon Race? They have good relationships with Humans. Wars? It’s already 800 years since the last one. Monsters? The Guild and Order of Knight are taking care of them. Return to Earth? It is eventually No-Risk.

What I’m planning after being caught up into this? I’m gonna enjoy the life in a different world as much as I want to, go on a cultural exchange and sightseeing, and after experiencing the festival that is only held once every ten years… I shall go home safely.

The other world was at Peace.

A kind world where the three races, the Spirit World’s Magical Races, the Celestial World’s Divine Races, the Human World’s Human Races, they are kind neighbors to each other, with everyone living a peaceful and fulfilling life.

But although I wished to peacefully spend a year before my return, for some reason, the heavyweights of this world keeps gathering around me, and…

Hidaka Akira is a high school student who loves solitude. He avoids the crowds in his class and decides to eat alone, but there is someone who disturbs his peace. It is Tsukimine Chiyo, the girl at the highest level in the school hierarchy, a girl who is absolutely beautiful. Tsukimine called Akira and asked him to do his "usual thing". What kind of "normal" did they mean, and why were her clothes off...?

Somewhere there is a strange café called "Statice" where all sorts of even stranger people meet, each with a very special and different fetish. The owner, Mr. Sennichi, welcomes these special customers every day, and tries to help them solve their fetish related problems.

By chance, ordinary salaryman Hiyoshi ends up becoming drinking buddy to his admired senpai from work, Tsukizawa-san. However, all the drinkeres that Tsukizawa-san brings him to are weird places...!? An adult love comedy featuring drinking spots that exist in real life!

Work is always on time, no play, always wrinkled between the eyebrows, the intimate atmosphere of the OL, Harukawa's back is a non-standard big eater that rises with tension in front of food (& Natural) was a girl !!
Harukawa's pleasantly exciting eating and knowing one side of Harukawa little by little, attention is also paid to the relationship with his colleague, Serizawa, who seems to shrink and does not shrink, a food love.

Shiori was once a guitarist in a light music club in high school but her first live performance was dashed when her brother ran away from home with a lot of debt, to become a musician in Tokyo.
A decade later, Shiori is now a high school teacher, leading a boring, uneventful life and paying off the debt... till she runs into the ghost of none other than famous guitarist Jimi Hendrix.
The story of a 27-year-old woman on her way to becoming a music legend begins here.

Mukouda Tsuyoshi was summoned from modern Japan to a different world of sword and magic. He thought of what kind of a huge adventure was waiting for him, but actually, Mukouda is just a civilian who got caught in a "Hero Summoning" by accident!! And that Mukouda's base status is very shabby compared to the legitimate heroes...
The only thing that he could rely on in this world is his unique skill "Net Supermarket," which enables him to order goods from modern Japan, and prepare them for various personas attracted by a different world's food...