Having been torn from the earth in ancient times, Planet Mamango is now re-approaching the earth after a lapse of 5 million years. One night, a private detective named Ban Shunsaku encounters a murder, and meets boy researcher Shikishima Kenichi, who holds the key to solving the case. Shikishima discovers that a stone from the Planet Mamango generates huge amounts of energy. Making a rocket out of the energy stone, Shikishima sets up an exploration team and departs for Planet Mamango. The rocket heads straight for Planet Mamango under the command of Shikishima, along with Captain Butamo Makeru, Ayame and Momiji, who are cabbages created by the captain, a rabbit named Mii, and Ban Shunsaku. In due time, the rocket lands on the Planet Mamango, where the group finds a “The Lost World,” an ancient environment where dinosaurs walk about and ferns and cycads cover the ground.

Note: The most widely available version (including the english one) is the 1948 one, directly published by Fuji Shobou. This is a remake of an unfinished series Tezuka wrote for the Kansai Kyouron Shinbun in 1946, which has been lost. He remade the series once again in 1955 for Bouken Ou under the title "Zenseiki Hoshi", but this version too has been lost.

Office Lady falls from a building is reincarnated into another world and ends up at the Devil Kings castle. Can she save him from the bad ending?

In the year 672 of New Era, the much-revered stylist and sovereign King Sayet passed away, leaving three great outfits known as his “legacies” behind.

So great were his treasures that it divided the nations and plunged them towards a bloody future plagued with war. The nations desperate to avoid war, not wanting to ravage their lands, managed to agree to settle the matter using a styling contests for ownership of Sayet's treasures.

This styling contest was far more intense than anyone could have imagined, having lasted as long as 9 days, and being remembered in history as the “Nine-Day War”.

Eight years later, the war is over and peace has been established between the nations. However, things are not what they seem, and the wind of war has started to blow again.

Nikki, a normal girl from earth is summoned to this new world of stylist know as Miraland, as she may be Miralands' last hope to shift the course of the land's fate.

Lise, a knight and daughter of a baron of the Kingdom of Olwen, lost her life protecting the young imperial prince Egbert. After death, she wakes up in the future with all her memories! But somehow she’s become engaged to the imperial prince?

The story of a (Former) Lady Knight… trying to dissolve her engagement?!

A romantic comedy about a reborn Court Lady with a secret!

The story of four adventurers, all whom have experienced betrayal and hardship, banding together in a middle finger to society.

The comedy spin-off story focuses on the Spear Hero, Motoyasu Kitamura. At the brink of death he acquires the power to turn back time, and decides that he'll use it to become stronger and start a "new game."

"To pass time before surgery, Hwayoon read a romantic novel for some steamy scenes.

Little did she know this would lead to her reincarnating into the story as an insignificant maid that's executed soon after. The goal is to survive, but things get out of hand... and steamy.

Souhei embarks on a trip in the gigantic labyrinth that suddenly appears in his basement. But it's an extremely special dungeon where the only way to become stronger is to do lewd things with girls and increase Lv (Love)! The story of a young boy who explores and does lewd things with women!

There was a time when mages were feared. In the Kingdom of Fulgund a female spellsword called Alfiris travels in hope to become a "person who can save others". However, those who manipulate magic are shunned even by the mercenary guild. If one day she finds a travel companion and her "curse brand" is seen... When one day she is reunited with Sister Anorn, a drunk who considers her a "friend", and gathers other companions to slay an archfiend― When overwhelming despair strikes them, Alfiris's right arm bursts into flames and a different persona emerges!

One day home from work, the exhausted salaryman Amano's bathtime is interrupted by an elf suddenly emerging from the tub! This clumsy but kind of brilliant (direct quote) otherwordly elf comes to the human world to take it easy and enjoy reading some manga.

In the year 20XX, Japan began exchanging ideas and cultures with other worlds. One day, a beautiful elf moves into the apartment next to Keita Inudo, a high school boy who aspires to be a Mangaka. But she won't be the only girl to push herself into Keita's daily life! Will he be able to cope with all these sudden appearances while keeping his home, his career aspirations, and his sanity intact?

17-year-old Satou is part demon/part human boy with a facial expression set in stone. Enjoy his misadventures in the Makkai (the demon world) private high school as the only transfer student from the human world. On the first day of school, Satou leaves a lasting impression on future monster classmates, and manages to tick off resident hot shot Grimreaper (aka talking bones), who's now dead set on seeking revenge for his humiliation - except, when it comes to Satou, things never go as planned...

Even though humanity loathed him just because he is ugly, Hero Garius still did everything he could for them.
However, after they double-crossed him, he finally had enough of humanity.
And now, he has decided to save the demon world because he finally found the warmth that he longed for in the demons' instead!!

"Don't look down on me just because I'm a child! Even though I look like this, this is my 10th life!"

I'm an illegitimate princess whose life was cut short after being misunderstood for having the same blood as the enemy country and died early. After nine tragic repetitions, I discovered the identity of my biological father. He is Paeon, a war hero who defeated the demon king and the strongest holy knight in the continent. He had a forbidden relationship with the princess, had me, and then deserted me!

In order to survive the harsh royal palace, I've decided to use and then abandon this impudent father. I will become the strongest as fast as I can and escape from this disgusting country!

And so, while I was building my strength, I happened to meet the demon king's son, Leo. He wasn't arrogant like his father, but he was pitifully living in captivity. So, I took care of him in secret.

"Asha, you cannot get engaged to anyone."

"...Huh? Why?"

"Because I’ll take responsibility for you forever."

"What?!"

"We spent the night together."

...What is this prince saying?

A father and holy knight who had (?) a forbidden love. Along with an enemy prince who is trying (!) to have a forbidden love. With them, can the unfortunate princess change her fate?

From Yen Press:

Nai–a young man who travels in search of another by the name of Karoku, a lone bracelet his only lead. Gareki–a willful young man who earns his daily bread by thieving and picking pockets. Thrown together at an eerie mansion, where they are entrapped and framed, Nai and Gareki are soon hunted down as criminals by national security forces. As they are driven into a corner, before them appears the most powerful defense agency in the country, “Circus”–!!

This is the Labyrinth City Orario. It possesses the only underground labyrinth in the whole lower world, and thus has prospered from it, coming to be known as the "Center of the World." Ryuu Lion, under the owner Mia Grand, worked daily at the pub Hostess of Fertility alongside her coworkers Syr Flova, Arnya Fromel, Chloe Rollo, and Lunoire Faust. One day, a pair of Humans' voices shatters the peace of the store... This is a fairy tale that won't be written down, the Story of Lion!

[Tensura] spin-off new serialization launched!! When I woke up, the slime figure was still the same salaryman as before!? Moreover, Benimaru, Shuna, everyone's here and I'm the section chief! Rimuru's middle manager's life begins without knowing the cause of it all!!

The hero Ares was about to fight the final battle for the fate of the world. However, the three party members who became his friends on the trip said, "I can't follow you anymore!" Yes, he was hated by all the party members. Their patience had run out and they finally left Ares. But that is what Ares, the hero, wanted. The last opponent is the genie [Demiurge] who is bringing destruction and chaos to the world. He cannot involve his party members in a fight from which they may not return alive. So it was his plan to play a disgusting person who would drive everyone away from him. Alone, the hero entered the final battle, and died… or did he? Eh? Am I alive? Why am I naked? And why is [Demiurge] sleeping next to me? What happened? I can’t remember?!

The hero who thought he was dead is loved by the girl who was the ‘Last Boss’ and living with her?!

"The Green Bird of Happiness"

It's figure was as divine as the phoenix of legends, and the timbre of it's songs was more majestic than any instrument.
It's said that if you were to encounter it, you will be promised happiness...

The stage: the city of Snowfield in the western U.S., far from Fuyuki. There, a "false Holy Grail War", quite unlike the original Holy Grail War, unfolds. There were those who had been keeping an eye on the auguries of the Holy Grail in Snowfield. According to an investigation by the Mage's Association, the Holy Grail War system in Snowfield was an imitation of the one in Fuyuki. What's more, the system was incomplete, leading to the exclusion of one of the seven classes and the selection of beings as Servants who ordinarily could not be summoned. It was, verily, a strange fake. As an organ of the U.S. government executes its various plots, the Servants are summoned one after another---