Kekkai Sensen: Beat 3 Peat centers around the crime fighting organization "Libra" and their battles in Hellsalem's Lot, formerly known as New York City. Hellsalem's Lot was created in a single night when a portal to the "Beyond" opened, and now it is a paranormal melting pot of monsters, magic, and the everyday mundane city life. It's up to Libra to prevent the horrors of this city from spreading to the outside world.

Izu Takashi was just playing the online game -Argate Online- like usual, but he suddenly noticed something strange, his level is now....!! Also he can not log out and the pain reduced funtion does not work.....

From MangaHelpers:
A young noblewoman once dreamed of becoming a magic user like in the old tales, but her time in magic school has dimmed her passion. One day, a mysterious man comes to her rescue in the forest, using magic like in the old stories. Despite the fact that he is clearly skilled in magic, he is thrilled by the idea of learning new techniques. Since the only way to do that in this day and age is in magic school, he alters his appearance to school-age and decides to accompany her back to school.

Garyou Hanagami is a veteran mangaka. Best known for the behemoth of a series that is Dragon Land, Hanagami-sensei has years of experience under his belt and is always thinking up new manga ideas.

Shinobu Miyama is not. An amateur working for Hanagami-sensei as an assistant, Miyama is nicknamed “The Chameleon” for his ability to copy the artstyles of those he works under. However, his true dream is to escape the faceless crowds and become someone.

So what happens when a work accident causes them to swap bodies?

Having lived a useless 30 years of his life, the main character (Saito Jinkuro) is hit by a truck. When he wakes up, he enters the body of "Dzink Norland", the 14-year-old son of an aristocrat who served as his Highness' escort. But due to the lack of skills with a spear, which were inherent in all members of his family, and terrible behavior, he was kicked out of the guard post, and then completely deported from the country... In addition to these problems, a window pops up before the eyes of the protagonist with information about "Elsa", his nanny. Another world, deportation from the country and windows like in video games? What will the main character do?

Web novel: https://ncode.syosetu.com/n9677fw/

Shiina Kazuya, our protagonist who got killed by a stranger when he tried to protect his childhood friend and little sister, reincarnated into Cain Von Silford as the third son in the world of sword and magic.

Cain grew up being surrounded by Gods who doesn’t know self-esteem, the upper noble and the girls who are swayed around him.
Being given so many protection from the gods, He overcame any obstacle (aka Flags) while hiding his unbelievable status. The noble path fantasy story of a young boy who sometimes wicked and clumsy.

Aizawa Yuri has reincarnated 2 times now and is dead tired of being the emperor of this and that. Using his skills he acquired a reincarnation artifact, and starts his life in a brand-new world!

Ichinomiya Shingo, a young 25 years old, single, company worker, while thinking of tomorrow’s busy working day goes to sleep. However the moment he woke up, it was a room unknown to him.

He then learned that he was inside a 6 years-old boy and had taken over his mind.

Furthermore he learned a lot from the memories of said boy: he was born as the youngest child (8th son and 10th child) of a poor noble family living in the back country. Having no administrative skill, he couldn’t do anything to manage the vast land his family has.

Fortunately, he was blessed with a very rare talent, talent of magic. Unfortunately, while his talent could bring prosperity to his family, in his situation it only brought disaster.

Yes, this is the story of the boy, Wendelin von Benno Baumeister, opening his own path in a harsh world.

Kaede, a victim of past sexual abuse, is obsessed with becoming "normal" ...

A bittersweet story about a boy facing coming-of-age questions about love, sexuality, complexes, and other troubles.

(Source: Ganma!, translated)

The master spy codenamed has spent his days on undercover missions, all for the dream of a better world. But one day, he receives a particularly difficult new order from command. For his mission, he must form a temporary family and start a new life?! A Spy/Action/Comedy about a one-of-a-kind family!

Won the Tsugi ni Kuru Manga Award 2019 in the web manga category.

This monumental manga became the driving force behind Shonen Jump, the tough kid boss of the neighborhood, Mankichi Togawa, uses his fighting skills and charm to find friends as he takes on the bad guys and the big shots who control Japan's financial world. This series, which was followed enthusiastically by the youth of the time, blazed the trail for a new class of readers. This work embodies the spirit of the magazine Shonen Jump. It had a major influence on the authors who followed. In 1969, it became the first Shonen Jump work to be turned into animation, and in 1971 it was turned into a live action film. (Weekly Shonen Jump Exhibition Vol.1 Catalog)

Aono Hajime was a prodigy violinist until he grew jaded with playing the violin due to personal reasons. Now in his third year of middle school, he struggles to decide his academic path. One day in school, he meets Akine Ritsuko, a hotheaded novice violinist who wants to enroll in a high school with a distinguished orchestra club. When he finds himself getting closer to Ritsuko and being brought back to the world of violinists, time starts moving again for him.

This is the beginning of a youthful drama where sounds and hearts alike resound in harmony.

Note: Winner of the 68th Shogakukan Manga Awards for best shounen manga (alongside Yofukashi no Uta).

KUZUNO Sekai was transported to a medieval fantasy game-like world (isekai). He was given a game controller with the ability to stop time and a 3 days countdown timer. Now he has to figure out the mechanics of this game world and clear it in time.

An angel made a mistake, resulting in Shiihara Daiki’s death. In order to hide the mistake, he was then sent to a different world. The angel will grant him one wish as a payment for keeping it a secret. Daiki asked for a Heavenly Castle floating in the sky without hesitation.

Suddenly a floating castle appeared in the new world, which causes confusion amongst the people. They attempt to contact Daiki in various ways. A country tries to steal it by force, while another seeks to befriend him. What in the world will Daiki do?

Toshinori Dokuraba, 35 years old. A so-called single aristocrat in Japan who enjoyed a single life without wife and children, even though he was tall, handsome, highly educated and had a high income. One day, he died alone at home.

However, he was liked by Hitorigami, the God of another world, and was able to reincarnate in that world. Reborn as Zirc Louren with skills and blessings from the God, he lived a new rosy life in a different world - then he turned 28 years old and enjoyed the single life again...

This is a story about the life of a single aristocrat who never gets married even if he reincarnates in another world.

Girls and sweets are full of secrets!?

Ichise Souma is a high school student who dreams of becoming a pastry chef and devotes himself to making sweets. He meets Satomi Chika, a female classmate, after receiving some sweets.

Chika is a beautiful girl with a soothing personality, known at school as the “Angel of Peace.” Souma thought she was a good girl who would kindly listen to his worries about making sweets, but...

"Ichise-san, your embarrassed face is really cute."

Chika shows an unexpected side of herself only when they are alone, and Souma’s heart is on the verge of exploding! A sweet and stimulating boy-meets-girl story with a mischievous angel connected by sweets begins!

From MangaHelpers :
High school student Misumi Makoto is called into a fantasy world by the god Tsukuyomi, in order to be a hero. However, powerful others in this world aren't as thrilled to have him there, and they kick him to the edge of the world just as Tsukuyomi declares that he must leave Makoto to find his own way. Now it's up to Makoto to find his own way.

A reliable office worker, Hanaichi Fudo, undoubtedly had a gift for the arts but gave up on his dreams of becoming an artist to lead a normal life. One day, his senior at work, Saori Wakaba, asked Hanaichi for help in writing her manga. Will he take up the pen again?! Written by Yosuke Matsumoto, author of "The Lady Becomes an Idol", a unique new take on aspiring manga artists!

Humans and demihumans live together in peace, and in this world, there's a normal human named Hironori Tabata.
One day, an angel named Suzuki Lina went out to find him and said she wants to have sex with him...the reason—? The Demon King will be resurrected in the future and Tabata's son will be the hero that will fight and defeat him.

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!