In the 30th century A.D., in a world in which magic exists, 100 years have passed since the human race won a war against the Devil King. Even though the war caused many sacrifices, slowly but surely civilizations began to rise again.
One day, a virtuous child named Sai Akuto ("Worst Evil") is adopted from the orphanage he's lived in ever since a witch quietly left him at the church as a baby.
Five years later, Akuto passes the test to enter Constantin Magic High School. But after arriving and taking the vocational aptitude test, Akuto receives surprising results:
Examination Numbers: Number 021
Name: Sai Akuto
Future Occupation: The Devil King

About the lives of the sextuplets: Osomatsu, Karamatsu, Choromatsu, Ichimatsu, Jyushimatsu, and Todomatsu.

Note: Won the 10th Shogakukan Manga Award in 1964.

School girl is trained by a secret branch of the police to detect and to kill demons disguising themselves as humans.

After 10 years of training, Yoichi returns home to fight against the Wenkamui, an endless horde of mysterious monsters that threaten the safety of his village. He's not alone in his fight; his best friend Ryuu, drawer of the divine sword Kamui, has also spent this time training to fulfill his destiny. However, a decade is a long time, and upon his return, not everything is as Yoichi expected it would be...

[Written by MAL Rewrite]

What would you do if you were given the power to make your own rules in which everyone has to obey to them?

From Tokyopop:

Yume innocently uses her magic to help the people she encounters--soccer players, the wrongly incarcerated, or two young lovers wanting to see the moon on a cloudy night. And you can bet that Yume's magic leads to new adventures--and a few mishaps!

This is a 4-koma comedy about a young girl named Ichimatsu Kohina who got possessed by a low grade spirit called Kokkuri-san.

From MangaHelpers:
In this story set in the early 1920s, Tamahiko is the son of a wealthy family, but his life is changed forever when an accident cripples his right arm. No longer considered by his father as an heir, he is shuffled off into the country, to live out of sight. The teenage Tamahiko shuts himself in his new home, bitterly thinking of it as the place where he will die. One day, he learns that his father has 'bought' him a bride to take care of him, when the young teen girl named Yuzuki arrives at his door. She comes into his life like an innocent ray of sunshine, and Tamahiko's view of the world and his life starts changing bit-by-bit.

Jung Yoon-hwan may be an orphan but he was a college student who was focusing hard on his studies, one day he is brought to a mysterious "White room" to fight even when he does not want to. Every time he defeats these monsters he gains psychic power, magic, and items beyond his imaginations....

(Source: Game of Scanlation)

N/A

This is the tale of how Adachi Mitsuru went from being an assistant artist on a weekly manga to the superstar manga-ka we know him to be today. But it’s told (and written by) Mitsuru’s older brother Tsutomu, who was also an assistant artist early on in their careers…

From MangaHelpers:

In a strange twist on Arthurian legend, young Art pulls the magical sword Excalibur out of a stone--only to find himself as one of a million Arthurs, fighting to defend the island of Britain from enemies and to earn the rank of the true king. Art is pretty puny, but his childhood friend Ligu (who was also chosen by an Excalibur) tries to keep him from being immediately killed.

Soon Art lives in a castle with knights, which are created beings who serve the kings. From the respect with which he treats the knights, he inspires some to hope he becomes the true king. But is that really achievable by a scrawny crybaby like him? [tethysdust]

A new transfer student, Tae Yeob, on his first day in an all-boys school (though it is enticingly close to an all-girls school), stutters through introducing himself. He's awkward at first, but the other boys' snickering stops when he says with sudden calm, "My hobby is fighting. My goal for the future is to become an MMA fighter. I plan on crushing all this school's fighters by next week."

After collecting information about the various personalities and fighting styles of the top fighters in the school, he's ready to make good on his word. Ssen Nom, The Strongest Fighter, is an earlier work of the manhwaga of the God of Highschool, and it shows its lineage in bruises and blood!

Slight retelling of the 2001-2002 Mazinkaiser OVA series. Included in this vokume is a short story called Mazin Kaiser: Shin Majin Densetsu (Mazin Kaiser: Legend of a New Demon God).

The story revolves around Nishimiya Shōko, a grade school student who has impaired hearing. She transfers into a new school, where she is bullied by her classmates, especially Ishida Shouya. It gets to the point where she transfers to another school and as a result, Shōya is ostracized and bullied himself, with no friends to speak of and no plans for the future. Years later, he sets himself on a path to redemption.

Note: Won the 19th Tezuka Osamu Cultural Award New Artist Prize in 2015 and the Ogaki City Cultural Alliance Award (Lifestyle Culture Division). Nominated for the category "Best U.S. Edition of International Material" in the 2016 Eisner Awards.

In ancient times, all of the demons recorded in the Classic of Mountains and Seas really existed. They absorbed humankind's thoughts to become more powerful. As time passed, people gradually forgot about their existence. The demons that were forgotten were all faced with the fate of disappearing...... there is a family that serves to guard and protect the only demon remaining in the world. As they painted and recorded, they were — the artists of the Classic of Mountains and Seas.

Li the God Killer, Wang the Devil Executor and Liu the Angel Slayer could never even dream about a reunion at Judgement Primary School. Can they turn the tide against the Demon God, Zhao the Heaven Fucker in Year 4, to change the cursed fate?

Based on the games of the same name, a variety of authors and artists write a large offering of short stories starring the various characters featured in the games. The stories range from being lovingly heartfelt, packed full of comedy and gags or being downright evil or messed up sometimes!

Note: These are NOT doujin. These are official comic anthologies licensed by Spike Chunsoft, the developers of the Danganronpa series.