The latest series by Hiro Mashima is a Demon World Academy Dark Fantasy!!
DEAD ROCK is a demon king training institution that towers over the depths of the demon world.
Yakuto, a young demon, challenges the harsh entrance exam to knock on the doors of DEAD ROCK!!

Nakajima Atsushi was kicked out of his orphanage, and now he has no place to go and no food. While he is standing by a river, on the brink of starvation, he rescues a man whimsically attempting suicide. That man is Dazai Osamu, and he and his partner Kunikida are members of a very special detective agency. They have supernatural powers, and deal with cases that are too dangerous for the police or the military. They're tracking down a tiger that has appeared in the area recently, around the time Atsushi came to the area. The tiger seems to have a connection to Atsushi, and by the time the case is solved, it is clear that Atsushi's future will involve much more of Dazai and the rest of the detectives.

It’s rumored that Class 1-A of a certain all-girls high school is hell itself, with every teacher quitting in a matter of days after being subjected to the girls’ abuse. Ultra-plain Jimi Taro (his name literally sounds like the Japanese word for “boring/plain”) is the latest teacher for this class but is unfazed about the challenge he’s up against.

Cute teenage model Hananaka Momo is the first to try and get him to quit, going so far as to fake a sexual harassment! Meanwhile, blackmailers, sadists and more lurk in this classroom of pretty faces, ready to challenge their new teacher. But Jimi’s motto is “virgin for life, teacher for life,” and he’s prepared to school these girls in more ways than one!

After being reincarnated into another world where the chastity and moral values of men and women are reversed and women rule the land, Faust was raised by his mother as a rare male knight. He's quick to become a war hero with many achievements under his belt, but because he inherited his way of thinking from his previous world, there's a certain severe pain in his groin day in and day out when faced with the likes of a scantily clad Queen who may as well be in the nude or the sexual harassment of the well endowed Duchess he calls a friend, among others...

Yuushi Kamome is a freelance writer who lost his beloved daughter in an accident. In despair, his wife leaves him, and he spends his days like a shell of a man. One day, however, a flyer from a strange religious group, the "Heart Laughing Society," changes his fate. It shows the image of his wife, whom he has lost touch with...This is a story of faith and madness. What is the black darkness of the cult that an evil smile invites? A chilling “new religion” suspense begins!

Hinako, a friend of Asahi's older sister, is a frequent guest at the home of the high school boy. She always misleads his mind with her suggestive attitude while treating him like a little brother...or rather, pet? A love story between a gal who has a bugged sense of proximity and an otaku guy who acts like her parent!

“Cheong-un, parry the attack! Move faster or the obstacle course will kill you!” The progenitors of the great Wudang sect and the mighty Shaolin encounter post-ascension issues when they find themselves reduced to servants in the godly realm. Their only hope and escape from their divine chores lie in the hands of less-than-average Cheong-un, who can hardly beat his peers in the sect. Can the masters raise an average boy into a master of martial arts and finally relieve themselves of their menial chores?

On the way home, Jin and his friend Komachi are suddenly transported to another world full of strange creatures and Jin is killed by them, but somehow manages to come back to life, but as a tentacled creature !? This is the start of a dark tentacle fantasy!

From ADV: Imagine a Neon Genesis Evangelion where choosing the right girl is more important than saving the world! That's the gist of Angelic Days--the hit manga that Eva fans have been waiting for! Based on a popular PC and Playstation 2 game released only in Japan, Angelic Days takes the angst-ridden Eva pilots and sets them in a lighter, brighter world.

A girl endowed with the power of clairvoyance has, because of her ability, difficulty finding a relationship. One day a boy younger than her declares himself and the girl for the first time does not see a bleak future...

Kanami, a young man that strayed into another world and suddenly awoke in a dark corridor is nearly killed by a demon and humans. Then preferring to use the status and skill systems Kanami aims for the deepest part of the Labyrinth. The skill [? ? ?] consumes his emotions, and he befriends some unusual people, but while his spirit wanes in the other world’s Labyrinth he refuses to give up on returning to his original world.

“I'll absolutely save you. Hence I will–!!” Aikawa Kanami awakes in a corridor he has no recollection of, the wound he received from a goblin is cured by a pretty girl called Lastiara, and he learns that he's in a different world that's exceedingly similar to a game. Kanami makes into his weapon the hearty welcomed status and skills, and with a pretty girl Dia plunges forward towards the deepest part of the labyrinth that's rumoured to “grant any wish”–. This is a story of a boy who exposes the deepest part (truth) of the labyrinth and fulfills a wish.

Kosuke was killed by Truck-kun, and was given the ability to live in a new world. Additionally, he was provided two lovely assistants who would do anything for him. This is a story of his adventures with them.

When six-year-old Inés laid eyes on the handsome heir to House Escalante, she promptly made the boy her fiancé. Since noblemen are all the same, she figured she might as well choose a pretty one. But Lord Cárcel isn't ready for this sort of commitment just yet, and he spends the next decade and a half avoiding the marriage at all costs!

Luckily, that's no trouble for Inés, as this marriage failing is exactly what she wants. In fact, he has her blessing to sow his wild oats as long as he stays out of her business. Unfortunately, being a playboy isn't as fun when your fiancée gives you permission. And doesn't this mean she's cheating on him too? Now, Cárcel is determined to change Inés' mind about him and prove he can be the husband she's always wanted.

In a distant place, on a certain mountain, a young dragon has been captured by a beautiful female tiger. The two, who were predator and prey, begin a journey to find a way for two animals with very different life spans to live by each other's sides.

TL;DR: Tiger Woman x Dragon Boy

Tokimori-san is a beautiful and successful woman. But when she's off the job, she tends to be a bit absent-minded! Living together with the charming Tokimori-san always makes me nervous!

Jahy-sama is an existence to be feared and respected throughout the Demon Realm.

Well, was.

The (former) Demon Realm No. 2 is now busy with house chores and work...in the human realm! Her dinner is just beansprouts, and she can't afford anything except water at cafes, but she won't get discouraged!

The story revolves around people who possess the ability to infiltrate human minds and manipulate memories. Their powers have been used in the underworld for covering up accidents, assassinations, and all manner of crimes. But these powers not only destroy others' spirits, but also corrupt the users' own hearts...

A human boy name Light is kicked out from the adventurer party called the “Race Union(gathering of races)” by his trusted comrades.

Makunochi Ippo is an ordinary high school student in Japan. Since he spends most of his time away from school helping his mother run the family business, he doesn't get to enjoy his younger years like most teenagers. Always a target for bullying at school, Ippo's life is one of hardship. One of these after-school bullying sessions turns Ippo's life around for the better, as he is saved by a boxer named Takamura. He decides to follow in Takamura's footsteps and train to become a boxer, giving his life direction and purpose. Ippo's path to perfecting his pugilistic prowess is just beginning.

Note: Won the 15th Kodansha Manga Award for Best Shounen Manga in 1991.

A girl with too much common sense, a boy whose sole ambition is to draw the perfect 2D bride, an addlebrained ghost member, and their always sleeping president — what is wrong with this art club?!