From Chibi Manga:

Meeting again your first love who moved school without a word…?

"I have no interest in a hollow word like eternity. So even if this is to end someday...I'd rather live in the moment."A romance between the Hatter and Alice.He's a man who tends to find most things troublesome, always looking so weary of the world. His jealous streak is almost as strong as his selfishness.The chaotic romance with this mafia boss with his great dislike for boredom is full of twists and turns, an utter mayhem.Fraught with dangers yet laced with tender sweetness, their love story unfolds in the land of mysteries.> Part of the Heart no Kuni no Alice / Clover no Kuni no Alice series( http://www.batoto.net/search?name=Alice&name_cond=c&artist_name=QuinRose&artist_name_cond=is )

Grant O'Hara is the young hotshot of the business world, shrouded in mystery, and now reporter Cheyenne has the chance to interview him. It's Mardi Gras in New Orleans, and Carnivale, a costume party in the middle of the city, is in full swing. Cheyenne dons a costume and joins Grant at the party, but she witnesses a murder in the hustle and bustle of the crowd. Who are these men dressed as red demons? Grant and Cheyenne dart into a church filled with couples. Trying to fit in, Cheyenne and Grant say their vows in a wedding ceremony, but it's not just the theatrical performance they assume it is. They find out that this wedding is the real deal!

Taken from Balloons & Chapters

Besides the fact that both of his parents are on an extended business trip overseas, Mizutani Masayuki was just your normal high school student. One day, Shimizu Sayaka, a girl who's in the same grade as he is, barges unexpectedly into his home and his life announcing, “Your parents hired me to be your maid!” From that day forward, Masayuki finds himself having to deal with Sayaka, the self-declared “live-in maid, er wife,” Takamura Yuka, his aunt who is actually younger than him and fondly calls him “Onii-chan,” the yandere girl Takagi Mai who is in love with Yuka, and his kouhai Ozono Anna whose imagination about Masayuki and Sayaka’s relationship always runs wild. Thus, his days of being caught up in those girls crazy ideas (usually unprintable) begins.

"Last night, I lost my friend."Sharp-tongued Sana and blunt Asa have been best friends since high school. They go drinking with each other, live next to each other and know each other better than anyone else. But a fateful summer night leaves their relationship irrevocably changed...

The foolish living things, the humans, who carry darkness in their hearts, lost the light from their eyes.

Deep inside the darkness, they lose sight of the way. Crushed in their despair, the humans one day meet creatures called the hotaru who each carry a faint, warm light. The hotaru provided the humans with the light, and started to live alongside them. But in this ugly and blood-stained world, the hotaru's number started to decrease day by day. Yet, the humans wanted the light and started to hunt the hotaru. For money they would throw away the life of a hotaru.

Nemu, a hotaru who has lost her light, makes a contract with an abandoned baby, Haibane. Haibane seeks to find a way to gain back Nemu's light.

Roan Summer is a 16-year old high school student who has been pretty unlucky when it comes to love. During his freshmen days, he fell in love with a girl from a different class whom he calls Miss Question Mark. Well, this is because he lacks the courage to ask her name, much less to confess his hidden feelings to her. Now, freshmen year is over and as he heads toward his sophomore year, he is wishing that by some miracle, he would finally belong to the class where his beloved crush is. Odds surprisingly favor Roan’s first day of school this time as he discovers that the vacant seat next to him is actually Miss Question Mark’s chair. However, one afternoon, a clumsy, pretty yet weird girl named Meory Winter ruins the moment as she comes rushing to the room where Roan is, causing the two to bump and to accidentally kiss one another. Pursuing his feelings for Miss Question Mark at one hand while trying to keep the “accident kiss” with Meory a secret on the other, together with his new, old and crazy friends, Roan Summer’s love story is now terribly tangled and twisted. Can Roan be able to escape this Love Rumble? Or rather is he willing to escape it to begin with? (L. Rumble!)

From Aerandria Scans:

Yakou Hoshino has the ability to create barriers made of water. He then lends his powers to a ‘ghost buster’ company where he meets the agency's only 'real exorcist', a woman named Rasetsu. Though Rasetsu has mysteries of her own including the fact that she’s cursed by an evil spirit, and that she’s the spitting image of Yurara’s guardian ghost.

Kirishima “Maa-chan” Masao and Kurokawa “Tai-chan” Taisuke have been friends since they were little—both looking out for each other, but when Maa-chan catches his friend being assaulted by a teacher, he can’t help but blame himself for always thinking and never acting on his desire to protect his friend.

Rin Hashiba lives together with her grandpa. One fateful day, while offering a prayer to God at the temple, a demon named Char appears before her. Seeking the blood of a virgin, Char is lewd, mean, and quite full of himself. He may act high and mighty, but in reality, he's very loving and kind. Even though she knows it's forbidden, Rin's body and mind are bound to fall into the demon's clutches one day...

from Renta!

The inexorable girl who aims to be a champion; Jain! and the innocent boy who loves her, Tae jin! Their challenges on the road to championship and an unfitting summer-like love story. -from Naver Webtoons Please address this work as a Manhwa (Korean word for cartoons)

From Yen Press:

This time travel period fantasy steeped in black magic is one of the newest works to come from the pen of Kaori Yuki, master of Gothic suspense. When Sorath is miraculously saved following a great earthquake and taken in by a sinister baron, he becomes ensnared in not only a romantic triangle, but also the dark secrets of the estate that becomes his new home.

Mu Qian Ran, a sixteen year old girl, who had always set her heart onto studying the art of Chinese medicine, is excited as she has been accepted into her first choice of college, Yan Huang Advance technical school! At the same time, due to a mysterious portrait of a girl that no one could tell when was it drawn, Qian Ran is able to see illusions of fire. She ignores the incident, but this would start the unraveling of a great secret.

This is the one-shot story of two newlyweds after they get married.

The story starts with the day when Joon Ho is about to propose the girl he loves, Ahn Seo Young but gets a heart attack and ends up in hospital. Lying in hospital bed when Joon Ho opened his eyes he saw a scary face who called himself A Dokkaebi (goblin). The Dokkaebi explains him how he ended up in hospital. The dokkaebi (goblin) once known for its nature of playing mean tricks on bad people and rewarded good people with wealth and blessings tricked a young couple (Lee Yeon and her fiancé Jo Won Ho) who were about to get married to play a game. The game had few rules: #Rule1: To prove he really loves Lee Yeon he will have to find where dokkaebi is hiding Lee Yeon within 20 mins after the game starts. #Rule2: If he fails to find Lee Yeon, she will die. #Rule3: He cannot quit the game even after their death so they will have to take birth again and in every birth they will have to try and find Lee Yeon to win the game. #Rule 4: He will have to remind her how the story started or else he will not be able to save her and she will die. #Rule5: He will have to finish the game before he is 29 years old......If they are unable to recognize each other before that one of them will die. #Rule6: He will have to find the one who knows how to end the game without any of them getting hurt. The dokkaebi (goblin) has been playing this game for years now but no one has been able to win against him. Will Joon Ho be able to find the way to win this game. Will he and Lee Yeon remember who they are will they win the game?

Legend has it that on the last day of every year, demons and evil creatures would create havoc. People named this as "Nian". On one snowing day of this day, a pretty young man with long silky hair picked up an abandoned baby and named her as "Xue".

15 years later, Xue has grown up to be a young lady. One day, a young man appeared and told Xue with a gentle voice that could melt the coldest ice, "I've been searching for you.. for so long.."

Eric is dying. And holding a secret.When his father helps a girl from his school after her mother died, his life turns around. He doesn't want to disappear anymore.

As a baby Jiro was delivered to his foster parents by a massive oni, who said he would return for Jiro in 15 years. When the time comes Jiro must contend with enemy oni, dark cultists, and their minions while attempting to protect both his parents and girlfriend from their depredations. Ultimately he must embark on a journey through the past, future, and other dimensions to embrace his destiny as Shuten Doji reborn.

From StarryHeaven:

A bittersweet story about the life of Kojima Ari and Fujitani Sousuke as they live together in a de facto relationship (without marriage) in modern-day Japan.

But will the choices and mistakes they make bring them together or tear them apart?

From StarryHeaven:
The story about a girl named Tenko who plays basketball. She has a boy (who also plays basketball) whom she has a crush on. One day she encounters a demon, with the shape of a fox. This fox-demon now possesses her body as he looks for his missing tail. As he searches for his tail in Tenko's body, the fox helps Tenko become closer to the one she loves, with magical tricks.