Long ago, a powerful demon lord ruled over the people until an equally powerful hero rose up to defeat him. To counter future threats, Rosewood Academy, a school for heroes-in-training, was created. Today, Rosewood Academy enrolls only the best of the best, and Arnest Flaming is the best of them all. The top student in the school, a dutiful girl nicknamed "Empress of Flame," she has an irritating encounter with a light-hearted boy in the school hallway one day who seems to equal her powers, though she's never seen him before. He introduces himself only as Blade, and Arnest soon finds out not only is he transferring into the school as a new student, but she is personally requested by the King to help him settle in to daily life in Rosewood Academy.

On the very first day that Kuze Aoi transferred to Hinomiya Academy, he finds himself facing down the barrel of a gun. He is introduced to the campus and the student body by his childhood friend Miyabi and learns about the prince and princess among students, Shitara Sagiri and Hinomiya Kuon. Sagiri is a cool and beautiful while Kuon is elegant and magnificent. After school, Aoi gets lost on campus and Kuon begins shooting at him and he's barely saved by a random girl named Atarashi Sonoko. It seems that Aoi holds a secret that is critical in a feud between two old, powerful families.

Manga adaptation of the 18th Pokémon movie.When Ash, Pikachu, and their friends visit a desert city by the sea, they meet the Mythical Pokémon Hoopa, who has the ability to summon things—including people and Pokémon—through its magic ring. After a scary incident, they learn a story about a brave hero who stopped the rampage of a terrifying Pokémon long ago. Now, the threat that has been bottled up for years is in danger of breaking loose again! Can Ash help his new friend overcome the darkness within...or will a dangerous secret erupt into a clash of legends?

From Etc:
Based on historical setting of Korea during the Josun Age. Long ago, in Jushin, secret royal inspectors named "Angyo Onshi" wandered the country and restored the order. But now that Jushin is destroyed, only one is still wandering.

Once again, The Throne of Caprice has ascended for the take. Whether the desire is of benevolence or madness, the Throne cares not. The mountain has risen and the world shudders as the vying persons and coalitions struggle for their own ultimate end.For thou to stand at the top and seize both keys, become The Absolute.

One of the first Super Robot manga and the one that introduced most of the traits of the Mecha genre. Constructed with the Super-Alloy Z, Mazinger was built by Professor Juzo Kabuto as a weapon against the Mechanical Beasts of the evil Dr. Hell. Koji Kabuto, the grandson of Professor Kabuto, becomes the pilot of Mazinger Z when his grandfather is killed, and battles from there on against Dr. Hell and his allies. This is the first series that introduced the concept of a pilot inside a Mecha, which all series from then on have followed.

Humans are always evolving. The ones who evolved in the right path would embody superpower, and called the "White." However, the when their psyche can't keep up with the evolution of their body, they'll lose their mind and go berserk. They are called the "Black." Jin is a part of Black Line; the security company against the Black. Jin swears to eliminate all the "Black" from this world–– wether by finding a cure to end the spread of the "Black," or with his own fist and power. (Source: MangaHelpers)

Those in serious debt to a certain man can either pay the price or join a certain game, a "gamble" as he likes to put it. To win, you must acquire points by defeating the other game participants. What will happen to the players...?

When the Fullmetal Knights Chevalion defeated the Death Universe, peace returned and the Chevalion members returned to their normal daily lives. Well, except for their leader, Retto. For some reason his suit won't come off. So he's stuck as Chevalion Red, and he has problems controlling his powers.

Top student Wang Fei has always dreamt about becoming a Judge, a pillar of light and justice for the people! However fate isn't on his side and he ends up going to a high school for delinquents. How is he going to survive? Will he rise to the top or be gobbled up in the chaos of the hell that is Shiji High School?

From Seven Seas:
Seven years have passed since Mina Țepeș' triumphant return to the Bund. The year is now 2020; integration of vampires into human society has greatly progressed, the threat from the three clans has been eliminated, her rule over vampiric society appears absolute, and the Bund has became an integral part of the world economy.
Now Tokyo is hosting the Summer Olympics with Mina as guest of honor at the opening ceremonies. During her speech, terrorists infiltrate the stadium and demand that she close the Bund and remove all vampires from Japan. In front of TV cameras, Mina and Akira must confront the terrorists. And that's not the only threat waiting for them.

Kanzaki Rei is an avid gamer, but one day he hit rock-bottom due to his debts. During the night while sleeping, a strange phenomenon happened and sent him inside the game he previously played. A world of life and death awaits.

From Sura's Place:

The 12 animals of Zodiac are given powers to rule the time. However, the dog commits suicide, thus removing himself from his role. The rat and the cow attempt to find the 13th animal, the cat, to replace the dog.

However...

Aoi Hana is a normal female high-school student, though she is extremely clumsy and thus tagged as good-for-nothing. But Hana wants to change herself and decides that finding a part time job would be taking the first step in that direction. Being an animal lover, Hana's job of dreams is encountering animals day-to-day and taking care of them - the zoo sounds like the perfect place for that. So when she happens to see a job offer from a local animal park it's settled she'll attend a job interview.
When Hana arrives at the zoo everything seems just fine. The "Oumagadoki Zoo" might be going south but altogether it's your regular animal park. Just a very normal zoo, one might think. But that is only until Hana gets to meet the zoo director...

A manga about combat maids engaging in trench warfare

August 1893, church calendar. The kingdom of Nohmaland declared war on the Flatanian empire and invaded their territory under the pretext of atrocities against Patlasi within the empire In order to support the regular troops, the empire send the [armed service], and armed maid group tasked with guarding/policing the castle inside, to the front lines. The war against the kingdom still continues.

An anthology comic of Infinite Stratos by various mangaka.

Haru Okamoto, a teenage girl who adores katana, is just now entering high school. When she was little, she happened upon a katana in her grandparents' house. In their haste to get the blade from her, they agreed that when she was an adult, the katana would be hers. However, to her dismay, they do not agree that a 15-year-old, immature, excitable Haru is an adult! Luckily, she finds another outlet for her love of Japanese swords, the almost-defunct high school Iaido club! As Haru searches for new club members and tries to get over her fear of boys, she will become aware that her affinity for Japanese swords has a deeper source than she could have imagined!

Yuzuko was left alone after her grandmother passed away. Shadowed by a mysterious organization, her family murdered by a psychopath, and with the sudden "breakdown" of the world, the missing pieces to everything is revealed, and the "Peppermint" inside Yuzuko activates...

From MangaHelpers:
Siblings Ayane and Kurumi have unique supernatural powers known as Ghosts, each with their own unique rating that designates their powers. Ayane has a score of 7, while Kurumi has a score of 11. Ayane's ability allows her to control shoe laces, while Kurumi can form contracts with objects, which allow her to control them. Ayane feels severely inferior to her sister, but will she be able to prove herself against the other Ghost-bearers in combat?