Opus is Kon's metafictional tale of Chikara Nagai, a creator under pressure to finish his latest graphic novel, Resonance, who finds that the harshest critic of the shock ending he's got planned is the character who'll have to die in it! Nagai's strengths and weaknesses as a creator are tested beyond their limits as his present and his past, and the worlds of the manga and of reality, become the levels of a maze he may never escape... let alone get a chance to resolve the story!

From Viz:

Out of nowhere, a Japanese elementary school is transported out of the world they know, and into a nightmarish wasteland. Have they gone to another planet, or is this toxic world actually a vision of Earth's future? Soon, the students and teachers must struggle to survive in impossible conditions, besieged by terrifying creatures and beset by madness. Part Lord of the Flies, part post-apocalyptic science fiction, The Drifting Classroom (1972-1974) is a classic can't-put-down manga series. It was adapted into a Japanese live-action movie (1987).

It was awarded the 20th Shogakukan Manga Award in 1975.

In an instant, a host of the recently deceased discover that they've been given another shot at happiness... as adorable cats! Will they make the most of their seven-day opportunity? Or will the fur fly as they struggle to figure out what life's all about?

The story centers around a teen-celebrity-like blonde-haired girl named Panty, who can form pistols from her panties; and a black-haired Goth Loli girl named Stocking, who forms a pair of swords from her stockings. The two are angels sent from the heavens to battle the Ghosts on Earth.
They are both fallen angels paying their way back to heaven with coins left by every ghost they get rid off.

Surh Jung-woo developed Gynophobia because of his trauma when he was younger. Even as a college student he is still afraid of woman, but Yoon hae-soo is a angel like existence for Jung-woo because of his fear. He starts dating after thinking he could trust Hae-soo, but while putting everything he has on line for her he falls into debt and gets cornered. After he gets betrayed by Hae-soo the person to save him is the most beautiful girl of this college, and the famous professor Pi Eun-na. What is this beautiful teacher after, and why did she help jung-woo?

Six men and women are reunited at a high school reunion. Our heroine Tamaki meets her first love again, which was unrequited, nine years after graduating high school. The next day she wakes up to find she has time-slipped 10 years into the past and is once again a 17-year-old?

A love story of redoing your youth!

Bad luck flows in from the sea, and running from the sea becomes the sad fate of Yume and Toji, who have just met. Will the world of the evil, hatred, and sorrow of the "Tasokare" begin to reflect the true selves of these two?

The series is set in the near future. Something unexpected happens as Ryoga Kamishiro challenges Yuma Tsukumo to a Duel. When the mysterious entity Astral appears before them, a new legend begins.

Leader of Sekihoutai, Sagara Souzou, staying ahead of the turbulence era with his people. High School student, Miyasaka Kotetsu, aiming to be the top in Kendo with his younger brother. In order to change the world, In order to protect you, guided by the red string of fate. They encounter as they transcend through time. The revelations of the Bakumatsu era and youth unfolds here!

Alexia Tarabotti is laboring under a great many social tribulations. First, she has no soul. Second, she’s a spinster whose father is both Italian and dead. Third, she was rudely attacked by a vampire, a terrible breach of social etiquette. Where to go from there? From bad to worse apparently, for the appalling Lord Maccon (loud, messy, gorgeous, and werewolf) is sent by Queen Victoria to investigate the incident, and he is none too happy to see Alexia at the scene. With unexpected vampires appearing and expected vampires disappearing, everyone seems to believe Alexia responsible, given her soulless ability to negate supernatural powers. Can Alexia uncover what is happening before she becomes the next victim?

A bloodstained man stands in front of a terrified girl. He proclaims his love for her and makes this ominous declaration: A year from now, she will either die alone or will be with him forever. Now, rumors abound about the cursed girl that causes any boy who proclaims his love for her to die. Join us to discover the mysteries of Metronome.

This is about a lazy ass kind of a baseball player, Taro, and A very serious crazy baseball player, Takami, that want to make it to the top. They cross paths on a bus that crashes. Takami dies and Taro lives. Taro visits Takami's grave and sees Takami's ghost. His ghost tells Taro to take him to the koshien and fulfill his dream. Think of it as Taro no Baseball. (play on Hikaru no Go)

The apartment-sharing comedy manga begins with Meme, the daughter of the demon world's most powerful summoner. After her father suddenly casts her into the human world to teach her some lessons, she finds an ad for an apartment with no rent or upfront fees. The catch: she has to entertain the young landlord Sentarō. To pass the test, she summons creatures and causes Sentarō to have a nosebleed.

A, B, AB, O...

These are the common blood types with which most people are familiar, but there are rarer strains in the world, "hidden blood types." Individuals possessing these are called "strangebloods," and they are imbues with incredible abilities by the very blood flowing through their veins.

But what happens when all of these disparate blood types come together? The result is rumored to be the legendary "Blood of Wisdom" which bestows god-like power. Little surprise, then, that more than a few unsavory characters are actively pursuing this awesome power. Can Chiaki Kaminaga and his friend Kaguya Daidouji survive this blood hunt...?

When twins are born to the Oda household, Karin is tossed aside as an unwanted child. The one person who gave her strength through her childhood was her brother, Oda Nobunaga. Now both adults, Nobunaga sets about his plan for world domination in order to unify the world and create a place of happiness for both his subjects and his sister. However, tragedy strikes as Nobunaga is attacked in his palace and murdered. Beside his death bed, Karin vows to take on her brother's dream and act as his substitute, even if it requires making a deal with a demon to do so...

Yuri, a modern day teenager who had just received her first kiss, is suddenly whisked away to ancient Anatolia where an evil queen wants her for a blood sacrifice. Luckily, the timely intervention of Prince Kail saves Yuri from the queen's grasp. For now. Kail promises to send Yuri back to her home, but the queen's persistent schemes to kill them both, plus their growing interest in each other, keep those plans delayed.

Note: Contains a side story called Orontes Renka that is published in the final volume (28) of Anatolia Story, which is set in the same historic period.

In 2001 this series won the Shogakukan Manga Award for shoujo.

From Oblivion Lumiere:
Soujirou possesses a special predisposition that causes him to "transform into another gender when his heart throbs." Moreover, her girlfriend, Ichijou Sakura, is an elite young lady who came to acquire the same special predisposition as well. Their love life is filled with chaotically transforming between male and female; is this normal romance or girl's love or boy's love or other!? This is a love comedy featuring transformation between male and female★

Michiru, a demon who feeds off of human's dreams, loves sweet and warm dreams!

When he meets Taiga, a human who gives him those kind of dreams, his life takes a complete change! Everyday without Taiga noticing he fills his stomach with delicious dreams. However one day, though humans shouldn't be able to see his form, it seems as though his eyes meet Taiga's.... Could it be he's finally being caught!?

From Easy Going Scans:
With an increasing population of ghosts in the city of Seoul, escalating posthumous territoriality begins to become dangerous for living residents. The solution: vacant buildings just for ghosts.

A reclusive youth, Ye Feng, fell into a foreign world. He then started a new chapter of his life in the world of "Ming".