The story will combine the legend of a demon king with a hero who crosses over time and other things. The comedy will involve traveling between a Japanese living room and another world.

From Transcendence:
Long ago, there existed a land divided into four countries: Sou, Kou, Do, and Ah.
The King of Ah took on a wife from Kou and soon thereafter one from Do, creating a shaky alliance between the three nations. When the Second Queen gave birth to a son, the King cast aside the sickly First Queen and her daughter Aki into the depths of the Palace. But as Fate would have it, Princess Aki encounters a slave named Hakusei, who has peculiar golden hair and sky blue eyes. He promises his life to her and helps her train in the Six Arts under the guidance of the enigmatic merchant Seitetsu. However, when Aki outshines the Prince during a hunt in an attempt to gain her father's acknowledgement, she sparks a war by besmirching Do's honor and drives the Second Queen to poison her mother.
With nothing left but her faithful Hakusei, Aki is banished to the small country of Kou with a vow to return to Ah one day for revenge. But in the face of the mighty allied nations of Do and Ah, will the two survive long enough to carry out Aki´s vow?

Note: Won the 60th Shogakukan Manga Awards for Best Shoujo in 2015.

William is the lone human in a city of the dead. Born with vague memories of a past life in contemporary Japan where he failed to do anything useful, he is determined not to make the same mistake again, and that this time, his life will be lived. But what does that really mean? Raised by a group of the undead, William must discover what circumstances brought him to this city and these people as well as what it means to not just exist, but to live a full life.

There was a time when there were ninja serving the powerful, hired for intelligence missions, destruction, or assassination. While the times have changed, the need for ninja has not vanished. In a particular school, there are girls who are secretly in training to become ninja. Ninjas-in-training, Asuka, Katsuragi, Hibari, Ikaruga, and Yagiyuu each have a secret technique scroll that they protect at all times. This features their tumultuous school life as they pursue the path of the ninja!

Strawberry Marshmallow follows the life of Nobue Ito, her younger sister Chika, and her friends Miu and Matsuri. The basic premise of each episode can be summed up as "cute girls do cute things in cute ways," be it trying to quit smoking, going outside to play, sleep over, etc.

After tomboy Haedam is thoroughly friend zoned by her first love, she's determined to glow up before college. But when she makes the wrong impression on her first day of school, she realizes she needs the help of her reluctant neighbor. In exchange, she promises to put up with their living circumstances and keep his secret. What could possibly go wrong?

I reincarnated into the world of an otome game as the villainess, “Ophelia.” I thought I'd be able to enjoy a peaceful school life, but to my dismay, I found myself subjected to constant harassment at the hands of the wicked, vindictive heroine; and to top it all off, I’m plunging headlong into the dreaded Bad Ending — hold up, as if I’d meekly submit to such a fate! If that’s how it’s going to be, I’ll tap into the top secret "cheats" known only to those who've played the game and carve out the 'Villainess Route' of my fantasies!! But for some unfathomable reason, the capture targets seem to be doting on me far more aggressively than in the original story…?
Original Web Novel: https://ncode.syosetu.com/n0411fu/

I wish for an ephemeral “happiness”…

Despite being born into a family with unusual powers in its bloodline, Saimori Miyo had not inherited any special abilities. Moreover, she was treated like a lowly servant by her half-sister, who in an ironic twist of fate had awakened an ability of her own.

Unloved by her parents and shunned by all, Miyo was a forgotten daughter. Even her childhood friend, her one and only ally, chose to marry her half-sister in order to take over the estate.

Seen as nothing more than a hindrance, Miyo is married off to the Kudou family.

To a man rumored to be cold and ruthless…

Adapted from a light novel! Japanese-style fantasy x Marriage. A story of love blossoming from marriage.

Dragged by the quarrel between brother of a count of a certain remote region. Kazami Shingo (風見心悟) was summoned into another world. The purpose for that summoning was “to make the territory prosperous”. To sum it up, it the typical summoned into another world thingy —- so was what Kazami thought at the time.「But, I’m only a mere veterinarian.」However, never underestimate a fantasy world. This world has dragons, monsters, and many other races. The difference of language, magic, food, religion, common sense, and many other aspects from Earth were also endless. Even so, the veterinarian become a public servant and for the time being performing autopsies, medicine making, and improving agriculture.Not as a hero, not as a doctor, but as a veterinarian, and this is the story of how he do his best in making this another world as his new house.

Hagiwara Sakura and Miyazawa Elena are the leading members of a popular idol group "Sweet". One day, Elena is injured by the attack of a female pro-wrestler Kazama Rio during the recording of a TV program. Sakura gets mad at Rio and gives her a dropkick. To avenge Elena, Sakura enters the female pro-wrestling matches.

Kuruto gets kicked out of the hero's party for being too useless. However he discovers that in everything else, like cooking, building, magic tool crafting, etc., he's SSS rank.

Shoot for the stars! I'm going to be the country's number one alchemist!

When young girl Sarasa graduated from the Royal Alchemist Academy, her teacher gifted her a house for her to set up shop. Aiming to become a masterclass alchemist, she gathers materials herself, experiments and operates a business. In her very own atelier, Sarasa indulges in a slow and relaxed alchemist life!

A town in ancient China has fallen under a curse and all the water resources are drying up. In order to save everyone, a young girl has been picked as a sacrificial lamb for the water God Kahaku, who resides in a far away places called Suiko. The girl and his bodyguard En travels to Kahaku to prepare for her sacrifice, however, everything is not what it seems.

"Why does no one remembers the true world...!"

The era when the great race of the five tribes competing for hegemony on the ground ended with the victory of mankind led by hero Sid. However, that world was suddenly "overwritten" in front of a boy Kai. In the rewritten world, Kai saw the scene where humans lost to the five tribal wars because of the absence of hero Sid—here dragons and demons dominate the ground, and Kai is a forgotten existence from all human beings. However, after encountering the mysterious girl Rinne, Kai decides to break this rewritten destiny. In a world without heroes, he inherits the hero's sword and martial art and challenges the mighty enemy races who reign supreme.

“Hey Kuroya-kun, do you like me?”
“How did you know!?”

Unrequited love. What a shame for Kuroya, a gloomy student in high school.
The other party is Kasumi Shiramori, a senior in the literature club and a transcendentally beautiful girl. While spending time alone in the club, I should have hidden this feeling for a long time…!
Senior told Kuroya in desperation.

“Then -? Want to try dating me first?”

There’s no way a relationship exists in the minds of these two!? No, wait, it should be like this-
Both the feelings and the super-sweet romantic comedy of youth are full of faintness in the misery of a longing senior who is teased despite being in a relationship!

A story about a man who wants to make a zoo full of mythological creatures in isekai.

120 million people have disappeared worldwide.

[Final Quest Completion Reward: 'Return' Activated]

For the first time in 22 years, Yoon Sang-Hyuk cleared the world's worst survival game.
He, the so-called strongest person among all other players, one who possess all reward items even the ones that no one else could earn, has come back.

[Return of the Masked Monarch]

A slice-of-life story about a new employee who can literally read emotions and an inexpressive but actually very kind senpai at work.

Though Chichi the cat looks very cute, she has one goal: eradicate humanity and take over the world! She decides to recruit comrades to aid him in her quest, but it looks like world conquest won't be that easy?!

Follow the adventures of Chichi the tyrant, Dunno the doggo who loves humans, and Kaiser Kang Taeshik, the hard-boiled wild hamster, as they face many hardships on their path to absolute dominion!

The fate of Ye Tian changed when he gained the ability to replicate the talents of other people. In order to protect his sister, he was struggling to survive in a world where alien beasts had invaded. In order to become stronger, he started exploring unknown worlds and gradually unravelled the secret to enter different dimensions…