Kiryuuin Kirari, a rich young lady who doesn't know anything of the world, is introduced by her mother to the historic Meisou Bookstore, which will be the setting of her first part time job experience. It turns out the Meisou Bookstore is in fact filled with anime goods, doujinshis and idol lives, a true otaku bookstore!

I love my boyfriend so much I'll tell the entire nation. I will love him as long as I live.

Boasting? No, just fangirling.
An enjoyable love comedy about the boyfriend-otaku who becomes crazy for her cool boyfriend as she showers him with love!

An autobiography, pulled from the tweets of a popular twitter user (Merori) that have also been compiled and made into a novel.

Author's Twitter: https://twitter.com/m_____urem
Artist's Twitter: https://twitter.com/plumin_00

Ordinary office worker Oohashi Rei wakes up in the body of the protagonist of her favorite otome game, Revolution. To her delight, the first person to greet her is also her favorite character, Claire Francois–the main antagonist of the story! Now, Rei is determined to romance Claire instead of the game’s male leads. But how will her villainous lady love react to this new courtship?!

Links:
Author's Twitter: https://twitter.com/inori_narou - Tweets in English, Japanese, and Korean.
Artist's Twitter: https://twitter.com/aonoesu - Tweets only in Japanese.
Official English Novel: https://sevenseasentertainment.com/series/im-in-love-with-the-villainess-light-novel/

Satou Kazuya is a 30-year-old office worker and a virgin. His daily routine is Playing Eroge while Masturbating. One night he got the "Peeping Application" from God, It was not an ordinary application but an application that could read a woman's heart.

Today, there’ll be discoveries and encounters again. For the girls marching forward in a world in its afterlife, there are still various things to experience: The remains of an extinct civilization, other living things, as well as lessons taught by the ruins.. there is still a lot to be seen in the world. That’s why... living is still fun!

Inspector Oogura Amane has just been reassigned to Investigation Division 6, which is considered a graveyard for police detectives transferred there. Disappointed to discover that her only partner is a slacker by the name of Ebisu Kei, she soon finds out that he has the ability to read the slightest change in facial expressions, or "Tells" as he calls it...

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?!

An unknown alien enemy attacks the Earth and the armies on Earth must try to hold off the invasion. It is based on the story for the SNES shoot-em up game Super Aleste.

This is the story of the daily lives of two women from different worlds. Yuria is a renowned model who can’t seem to resist protecting her manager, Okabe, from other guys making a move on her. Both live inside a romantic comedy, hiding what they feel for one another.

Ling Chen lived as a villain for 35 years, but in the final battle with the hero Ye Muxue, he "initialized" reset-reborn back to 17! what? Do you think he wants to be human again? Less talk! Of course, it's time to kill Ye Mu, who wasn't super powered at that time!

Collection of oneshots. Included works:

1. Osana Najimi no Majo ni Tsuite (幼なじみの魔女について)

2. Aoi-kun to Wasurenagusa (藍くんと忘れな草)

3. Nami no Hazama ni (波のはざまに)

4. Scissor Reset (シザーリセット)

Gunji Akira, who has just started high school, has been chasing after his father's ghost by trying to become a police officer just like him. One day however, he has a surprise encounter with an alien while leaving school. And there begins the start of his fateful adventures with extraterrestrial life...

Note: It runs in a seinen magazine and will not be BL. At most, just as Fujobait as any shounen sports manga.

Sumire was a high school girl before she leapt into another world the moment she fell down. Before she could collapse and die, she came across a silver-haired boy who had already collapsed and was dying. One thing led to another and she ended up working at an Adventurer’s Guild. She doesn’t have any special powers, but she’s well liked by strange plants and animals. What does Sumire’s future hold?!

Artist's Twitter: https://twitter.com/matuitommy

The manga is set in a world where, beginning with vampires, the supernatural world has been exposed to the public. Dorothy, a member of the Red Sisters clergy group that hunts down supernatural beings, has a fateful encounter with a blood-drenched woman named Maria.

Links
Author's Twitter: https://twitter.com/mitogawawataru/

Late at night in the middle of my part time job at a convenience store, I had an encounter with a robber and was mercilessly stabbed to death.

As I was about to lose my consciousness, I thought about how much I wanted to do this and that when I heard a voice……

『The wish to be summoned has been confirmed. Granting Unique Skill 《Jack of all Trades, Master of None》』

Rude words such as that were said. Jack of All Trades, Master of None? Don’t screw with me!

Such thoughts and wishes were for naught as my consciousness faded, when I came too I was standing on a green foggy hill.

(no overpowered protagonist and no harem)
[Description from novelupdates.com]

When a girl was taken to another world, for some reason she transformed into a half-cat beastman! Through a chance encounter, Cha found a new purpose in her isekai life - fighting youmas alongside her new comrades.

Kou Kousaka is an ordinary salaryman working overtime in a black company when a totally unprecedented event happens: he dies and is sent to another world.

Unlike those other isekai novels where the main character decides to be a hero or a demon lord, Koko here doesn’t care for any of that. The isekai system rewards his lack of choice with several powers which have never been seen before: the ability to store items in a limitless inventory, immediately dismantle them into materials, and then use them to create something new.

How will our completely unique hero survive in this new world?

24-year-old Mitsuki is a proper, yet cute company worker who has dated plenty of guys.
However, when her boyfriends pat her on the head, caress her cheeks, and say heart-racing lines, she ends up shuddering at these heart-pounding actions instead…!
Unable to enjoy the “ordinary happinesses of women” and unable to date anyone for long, Mitsuki reached the age of 24…

“This next relationship will be the end of that!” Declaring as much, Mitsuki started going out with her current boyfriend, the handsome 28-year-old elite company worker, Shinomiya.　

Encountering this perfect young man, however, awakened Mitsuki’s previously hidden nature…

I, Fiara, was born to a commoner father and a mother of noble status.

From a young age, I was treated as a maid while my mother only dotes on my younger sister. No matter how hard I worked, I was not allowed to advance in my studies as well.

“If so, I should just leave such a family...!!”

After running away from home, on my way to the royal capital, I met a magic user, Zack, who changed my entire life.

Web Novel Raw: https://kakuyomu.jp/works/1177354054890053336

A high school girl who lives alone in her parents' home, away from her sister and mother who are working as actresses in Tokyo. Under such circumstances, my family's birthday, for a long time, somehow, popular actor Shiraki Araki appears instead of the family! Araki rushed to the confused Yakko, saying, "He became a star to help him find her." "Keep me"...?! A gift (?!) that arrived at JK who was worried that there was nothing for me. It's the start of a half-lived love comedy with a superstar!