Several Rozen Maidens awake during the Taisho Era, while the remains of their prototype, the "zeroth" doll, begin to cause problems which even could destroy Tokyo.

Year 526 of the Liturgical Calendar. The world knew that witches existed, and that they practiced the notorious art of sorcery. Nevertheless, the world did not know anything about the study of magic.
The story follows a half-man, half-beast mercenary; humans mockingly call his kind the "fallen beasts". He always dreamt of becoming a human, but one day, he met a witch who would change his life forever. "Do you desire a human form? Then be my escort, mercenary!"
The witch introduced herself as "Zero", and explained that she was searching for a one-of-a-kind magical tome that bandits had stolen from her lair. Entitled "The Book of Zero", the grimoire supposedly contained valuable magical knowledge that could be used to effortlessly bring the world to its knees. Thus, in order to realize his dream of becoming a human, the mercenary must accompany Zero on her journey despite her being one of the witches he so loathed.

The "slapstick drama" begins with Seiya Kanie, a high-school boy who is invited on a date in an amusement park by a mysterious beautiful transfer student named Isuzu Sento. He is introduced to Latifa, a "real" princess and the park's manager, and is asked to be the acting manager of this "disappointing amusement park in the Tokyo suburbs."

Diet... to avoid the Bad End!
In a former life, Cosette was just a normal housewife. Now she's been reborn into the world of an otome game, not as the heroine, or even the villainess, but as a chubby unnamed NPC?! Is she destined to be pushed aside as the heroine follows her route, or can Cosette avoid the dark future that awaits her?
With six years left before the game's story begins, her first step is to improve her image. She'll use all the high heels, training equipment, and knowledge from her former life that she can to get herself into shape!
As she works to carve her own path, she gets wrapped up in royal intrigue, and winds up getting to know the prince?!
How will things turn out in this unconventional love comedy?!

Renellette is the beautiful daughter of a Count, with a position, an education, and enough property befitting her status, yet somehow she can't get married. One day, while searching for a marriage partner, she meets a man who rekindles memories of her past lives, a stalker who interferes with her marriage every time Renellete reincarnates! She struggles to shake off the obstacles between her and a happy marriage in this life, but his shadow is always flickering behind her... The long-awaited comedic love battle fantasy!

From MangaHelpers:

Supernatural creatures live alongside humans, but these "rares" are being hunted to extinction over time. An organization is being formed to protect these rares, and allow them to live their lives as they like. The starting members of this organization are few; there's the masked Fukumen, the Black Vampyr king AxL, and they are soon joined by the sweet-voiced mermaid Mirror. Together, they will protect the rares from the deadly hunters! [tethysdust]

Following a temporal war that ravaged Japan, the young Shoichi, his two sisters and other children must flee their homeland by boat. During this journey, they are attacked by strange suitor samurai from the future. A girl named Shizue is even "draw" the face by an unknown life form. The children will be rescued by the crew of a strange battleship, the Yumihari. On board, Shoichi can only note that Shizue, curiously has no further injury...

Akito wants the stereotypical isekai experience and so he summons himself to another world, however things don't quite go as planned. He's the same unskilled loser that he was before. He can barely scrape together enough money to eat. One day a cute girl approaches him with a contract to join her party. He can't read what it says, but ends up being forced to sign it anyway. What's the worst that could happen?

In a world where strength decides everything, people can awaken special powers by killing others. The protagonist, Bai Yi, became a “doctor” to heal the wounded and put a stop to evil... only to find out that there is no such thing as absolute justice or evil.

An edutainment adaptation of the mobile game Cookie Run, that teaches Hanja (Chinese characters used in the Korean language). Featuring an alternate universe where running, playing, and Hanja are banned for safety reasons, and the country's temperature is rising due to a volcano. With the help of elders that were champions in the past, a group of courageous Cookies go to collect pets and learn Hanja.

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From Viz:
In a postapocalyptic world of heavy metal fantasy, the only thing able to save humans from orcs, lizard men, and other monsters is something even MORE evil. Sealed within a 14-year-old boy, the chaotic wizard Dark Schneider is unleashed to fight four mighty generals and their plot to resurrect the evil god Anslasax!

In the world of Eluveitie, elves and dark elves have been warring since ancient times. The one thing that could tip the balance for either side is a half-elf child born from the nameless Earthling main character's seed. This is a tale of the drama and tragedy of the battle for one generic harem lead's baby batter.

A series of vignettes portraying the day-to-day life of a little girl with a very vivid imagination.

From /ak/ Scans :

Sick of the trickery in the royal court, former knight captain Hans now serves at a remote station in the countryside. But his peaceful and idyllic days end when some Japanese people with superhuman abilities suddenly show up.

The deceased Vatanuki decides to become a hero in a parallel world under the guidance of a goddess. However, someone kills the goddess and carries the hero to another place. And then terrible things begin!

Life is like the glimmer of the stars: sometimes merry, sometimes subdued. When I was born, my mother named me Ruka. This is my ordinary, extraordinary life.

“Wait for me, Louisa.” Those were the words that the hero, Graham, said to me before he set off to defeat the demon king. Graham who is both my childhood friend and lover. But, I have no intentions of waiting. In fact, I have the memories of my past three lives, and in all past three lives, I have been the hero’s childhood friend and lover. However, all past three heroes always found other women and never came back to me! That’s why I will no longer waste my time waiting for the hero to come back, this time I will definitely be happy!