In another world, the Hero and the Demon King continued to oppose each other. As their great magic collided, the explosion crossed over worlds and destroyed a classroom full of high school students. The victims who died in that explosion will be reincarnated in that alternate world. Our heroine, who has the lowest standing in the class, was reincarnated into a spider. She nevertheless faces this challenge head-on with great determination, and adapts to it surprisingly quickly. This is the story of how our protagonist, who was reborn as a weak spider monster, does whatever needed to survive.

I was a normal high school girl but then I was reincarnated as a monster spider in a parallel world. To survive in this labyrinth full of monsters, I used a skill “Parallel Will” and split my mind in 4 but now each will have their own body... ?

The country called Yukifune is now in an age of air travel, and a group called Saratros exists during these times. Armed with blimps and gliders, what is the Sarastros' true nature, and what is its purpose?
Meanwhile, the army's watch for the Saratros takes a mysterious turn... and soon, Koto, the girl with the golden hand, will deal with the world as she makes her way out of the huge fighting stage!

In an alternate history of the aftermath of World War II, Japan has been cleaved in half, with the south—Honshu and the other islands—allied with the United States and the northern island Hokkaido annexed by the enigmatic Union. It was on Hokkaido that a mysterious tower had been built, a strand of metal reaching up out of the atmosphere, visible from the northern tip of Honshu. In 1996, three teenagers, Hiroki, Takuya and Sayuri, make a pact—they will build an experimental aircraft, almost invisible to surveillance, cross over to Hokkaido and unlock the secrets of the tower. Their dream was never realized, because Sayuri was sent to Tokyo for treatment after she fell into a coma. It is now three years later. The rosy illusions of youth have fallen away, but not the unbreakable strength of the trio’s promise. The truth of the tower will be uncovered, and with it, the link between it and Sayuri’s mysterious, carefully tended condition.

This is a manga version of the film "The Place Promised in Our Early Days"

1-2) Kumo no Uede Kiss wo Shiyou
Young, earnest flight attendant finds himself attracted by the dashing pilot... whose charm also makes the young uke insecure. Will this sex-based relationship survive? Also, why is the dashing pilot kissing someone else after sleeping with the uke?

3-4) Zettai Fukujuu
On the outside Nachi is a student living with his cousin Shinya for free in exchange he's the "maid". What no one knows, not even his friend Kanda, is that he's also Shinya's sex partner. With Shinya's rude, arrogant behavior to Nachi how long will this "master" and "servant" relationship last? How long will Nachi be able to keep the truth about his relationship from Kanda?

5) Kumo no Uede Kiss wo Shiyou extra

Volume 2 in the Kishibe no Uta series. A collection of four short stories:

Ushinawareta Kishibe (失われた岸辺)
Nishi kara Kita Hako (西から来た箱)
Kumo o Koroshita Otoko (雲を殺した男)
Akai Hata (赤い旗)

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In a country without water, there existed a ritual whereby the people prayed for it. In this country said to be inhabited by the Cloud Dragon, legends speaks of a dragon tamer who can bring rain.

Presenting, a collection of grand oriental fantasies including "The Man Who Slayed the Clouds," and three other stories.

For a shy boy and an energetic girl, love starts at their part time job!

From MangaHelpers:
Marta is a friendly, happy Portuguese girl who lives in Japan. She loves Portuguese food and often breaks into dance.

At Jinpu mountain, Chinmi Tao Ryuen is a student at the Korin temple. Every one at the temple sees him as the weakest, even the younger students don't show any respect for him and make fun of him as soon as they get the chance. But when he suddenly is in the Bout challange(this Bout of the champions is intended to choose the best student to receive a special lesson later on) and the other challanger is the powerful Kuen.

After a shocking oneside fight Chinmi Tao wins. After the fight, Chinmi Tao is called to see the master, and receives shocking news about what is happening in the country...

From Tokyopop:

In a faraway village, in a magical land, live Juline, Bakuya, and Seika, daughters of the top three martial-arts schools. Join them on a quest to uncover the mystery of the Black Pearl, a new clan shrouded in shadows. Juline and the other clan leaders face a new threat in the form of the Black Pearl Guardians. Who are these mysterious warriors, and what is their link to the princesses' past?

Eighteen-year-old Mutou Kunimitsu sees how political injustice is committed all the time and that the government is profiting from the poor and labor class. So, he decides to change all of Japan. Here starts the legend of the man later known as the "Japanese Don."

Won the Kodansha Manga Award for Shounen in 2003.

In a school of delinquents, there's one student that hates guys who pick on the weak, and his name is Kunio. He's as strong as they come, but unfortunately he's also lazy and perverted. Can Kunio win all of his challenges and survive the crazy antics of his opponents?

Ore wa Otoko Da! was awarded the Shogakukan Manga Award for children in 1995.

Izumo Kunisaki, a descendant of Izumo no Okuni, is often mistaken for a girl. It is the bane of his existence. His father and best-friend often laugh about it. To top it off, he plays the girl roles in his family's Kabuki troupe. In this short, he discovers that that curse is also his greatest source of strength and will prove just how much of a man he is.

Takashina, who usually finds it unpleasant to maintain close relationships with others because of his extreme sensitivity to smell, accidentally encounters the perfect scent while helping out one of his senpai at the college lab one night. From that day on, his desire to keep experiencing that smell grows ever stronger, and then...

The story of Kuno Chiyo, a tsundere with the power to see the future, and her friend Kishida who likes her.

From MangaHelpers:

Ichinose Kouta is transferring to the academy his grandfather runs. He knows little about it, except for the fact that the students are mostly female, so he imagines that his life will soon become a delightful harem-type story.

When he gets lost on the way to the isolated school, he finds out there's a lot his grandfather didn't tell him. The school is actually an all-girls school for ninja! At first, the girls think he's an intruder, and he barely escapes with his life! Luckily, the misunderstanding is cleared up, and he finds himself under the protection of the beautiful and deadly student council president, Fuyunagi Rindou.

But even now, his life will be anything but uneventful, as he finds himself in the middle of an ongoing conflict between Fuyunagi's student council and another student group, headed by a girl known as Momochi Yayoi. [tethysdust]

Otonashi-san has just transferred into a perfectly ordinary high school.
Silent and impassive, she's actually a kunoichi, a female ninja! (Not that she hides it well...)
See what a ninja, the famous traditional Japanese hero, would be like as a high school girl in this off-beat, four-panel manga!
Don't miss Otonashi-san's quirky appeal!!

On a school trip to shinobi-themed Ninjatown, a young man named Ichi Kuno accidentally springs a mystical ninja trap which sends him back to the Age of the Ninja. Having no other path, he must pose as a girl and infiltrate Kurenai Academy, a school of kunoichi students, to retrieve a mystical scroll that can return him to the future. But when everyone around him is already far better at stealth and infiltration than he could ever imagine being, it's not going to be easy. He'll need to employ his own special bag of tricks, and have a lot of luck, if he's going to last more than 5 minutes surrounded by hot kunoichi girls, every one of whom would happily kill him in a moment if he's discovered.

A high school student Ichi who visited a ninja residence on a school excursion was caught in a strange structure during the tour and time slipped to the ninja world. Along with his friends, Ichi who got the “Ninpocho”, a key to return to the present age, returns safely to the present age. However, suddenly an awakening appears in front of Ichi who lives a peaceful life ...!?

The plot centers on the titular Tsubaki Kunoichi, the best student in her school, and a curiosity that she cannot reveal.