An ordinary, bored, bullied high-school boy. A mysterious, frail and cute transfer student who just happens to be a feared delinquent and studies the Chupacabra. They meet and start going out together. What can go wrong?

From Rayns&Lele Scans: A devastating disease called Melancholia spreads across certain areas of the city, causing the unfortunate person to lose their memories of their most important person. Kazanami Toki is unaware that he has caught the incurable disease, but "by chance" he meets his forgotten lover, Hanamiya Yuna. After their fateful encounter, he is left with a strange feeling he is unable to understand...

What will Seimei of Abe, the royal palace’s most powerful sorcerer, do when he has to deal with a lovesick demoness, his jealous dragoness wife, and an arrogant new rival – all at once? Also includes Seimei’s back story, a romantic twist on a classic Japanese folklore.

From Agent of Change Translations:

Sasakura Hakka, 14 years old.
One day, when I got home a strange creature in a Kigurumi suit, Ginger, was standing there!
It seems like Hakka has been chosen to rise with her comrades as, Guardians, to protect this world from the evil invaders of a different dimension, but...
The Kigurumi suited creatures have suddenly transformed into gorgeous male eye candies!? A heart-pounding, action packed Kigurumi Adventure!!

When a mysterious so-called meteorite crashes, a group of students gather to go and investigate it as part of their club activity. Low and behold, the meteorite is actually a futuristic, high-tech supermarket! What comes after is only weirder and weirder as they encounter more things that are out of this world. Follow these students as they go on supernatural adventures!

From Horobosu Scanlations:

"Seriously, I'll finish you within three hours."

That's what Kirishima Haru had in mind when he entered the virtual world of a dating sim. Haru's had it all since childhood - looks, charisma, good grades, athletic talent and girls, but in this virtual world, Haru would meet the only thing he wants and unable to attain. At the edge of the incomplete world, the love story of a player and a NPC unfolds.

Yuuki Tsumire was raised by her single mother, who always told her to keep smiling, no matter what hardships she endured. The two of them were a family, until Tsumire's mother died from illness.
Tsumire soon learned that she had a family she knew nothing about: a cold, rich family that disowned her kindhearted mother when she became pregnant. Tsumire now must go live with this family, even though none of them seem to want her there. She doesn't have to switch schools, so she at least has her friends to help her through this difficult time. However, she doesn't have the heart to confide in her friends with even more problems, so she tries to keep it bottled up inside.
To her surprise, the Yuuki family lawyer, a young man named Hino, soon becomes her emotional support in this difficult situation. However, Tsumire's reactions to him might mean that she wishes he were something more.

A series of short stories about business men in a romantic relationship.

Volume 1:
1) Sebiro no Housekeeper 1
2) After 5 PM Wolf Man (continuation ch1)
3) Dr. Arima's Medical Records 1
4) Not Ready?! Sensei 1 (Prequel of Not Ready!? Sensei)
5) For Whom The Bell Tolls
6) After 5 PM Wolf Man 2 (continuation ch2)

Volume 2:
1) Sebiro no Housekeeper 2
2) Dr. Arima's Medical Records 2
3) Not Ready?! Sensei 2 (Prequel of Not Ready?! Sensei)
4) Sebiro no Housekeeper Extra (New Edition)

From Fujoshi Bitches:

Takemiya is working as a secretary for the Young President, Iwase. Iwase is an amazing guy who has a huge gap. Compared to his gorgeous looks and capabilities, he’s an airhead and his honest side is totally cute! The younger dog, Takemiya, is madly in love with that President and always gets led around by him, but…?! The dog suddenly returns the favor clumsily saying, “President, I want to hold you.?!"

There is also another story about a high and mighty master president×beautiful “pet” secretary.

From MangaHelpers:

Aizawa Katori goes to a school with an unusual rule. The nearby, separate school building is full of elite male students, and the school wants to prevent any of the female students from getting involved with them. For this reason, all the girl students are required to wear masks! Katori wears a horse-head mask, but she hasn't given up on getting through to her long-ago childhood friend and crush, Shinra. Shinra also has a crush on Katori from when they were children, but he does not recognize her as the strange horse-headed girl who speaks to him! [tethysdust]

The Kirionira are the demons that live in another dimension and invade the human world through people's dreams. The only defense humanity has against the demonic assault are the hunters who rely on their sex drive as a source of power to fight against them.
Riku Yoichi came from a long line of hunters and had high amounts of sexual energy which allowed him to be a great hunter. He moved away from his home town after middle school to demolish the Kirionira and was successful in finishing off the king and ending the battle forever. However, the peace came at the price of Yoichi losing his sex mojo.
Returning back to his home town, he soon learns that the demon invasion was not over, but without his sex drive, he is helpless to fight back. He tries convincing his childhood friend Namba Midori and her female classmates to get him sexually aroused, but they want nothing to do with it.

Based on the Nintendo DS / Playstation Vita game of the same title.

Inside every living thing is "Spiria", the core of each soul. Recently, there is a disease that contaminates people's Spiria, known as "Despir Disease". Despir Disease turns out to be due to the presence of Zeroms, the dream eating demons that are believed to only exist in fairy tale, inside a person's Spiria. The way to cure this disease is to link into their Spiria, called Spir Link, get pass the Spir Maze, the labyrinth created by the Spiria and defeat the Zerom before it consume all of that person's Spiria. This can only be accomplished by using Soma, the weapon which allow the person with strong Spiria to link into other people's Spiria and defeat Zeroms.

The story focuses on a young man, Shing Meteoryte. After his grandfather leave the quiet village where they lived in, Shing went down to the nearby beach, only to find two people lying unconscious ashore. Those two people turn out to be Kohak Hearts and her brother, Hisui Hearts. The meeting of Shing and Kohak sparks the start of his first adventure out of quiet village to the world...

A tale of love in all forms: pure like a child's, twisted like that of a scorned, lonely woman, and multi-faceted in between. Kurt, the prince of a faraway kingdom, leaves home to find a way to heal his petrified goddess-mother. Battling numerous monsters, overcoming challenges set forth by Medusa's apostles, and helping other people all seem so heavy for a ten-year-old boy. But never fear, he's not alone. His youngest aunt, a goddess from heaven, his girlfriend collected along the way, his-not-quite-adversary, not-quite-friend, mysterious dark apostle and various others are with him. All are drawn in by his charisma, his will, and his purity. Let's join Kurt, to travel to far, far away lands, to meet interesting people, monsters, gods, and goddesses...and then to kick their asses.

Chie had always tried hard being a student vice president at school for the sake of her crush that is the student council president himself. She is currently a third year and is on a brink of graduation, so her goal is to ultimately confess to him. While she is busy working within the last days as the vice president, she particularly gets closer to a certain kouhai. Will Chie be able to confess before her days in the student council is over?

Kouda’s job in Tokyo didn’t go well and now he lives as a cafeteria worker back in the country side. One day, he meets Nojima, who moves into the neighborhood, and becomes close with him, but finds out he’s the leader of the notorious Nojima group! But contrary to his reputation, Nojima asks Kouda to eat with him every day, and he can’t seem to sleep by himself because of the rumors that ghosts might appear in his house.

From ryColaa:

There are mysterious masked-men trying to conquer the earth!! And to defeat them, the state started a project team called 'Rebirth Knight'.

Kang Chan, one of the strongest high schoolers, meets a girl named Chaewon and falls in love at first sight. However, Kang Chan hears from Chaewon that she is a member of the Rebirth Knights, and decides he wants to be a member too...

Takasaki Tomoka is a young girl seeking love. She had finally found her prince and slowly began to think of a way to speak to him. Tomoka met up with her childhood classmate from piano lessons, Miyazawa Arata and was invited to a performance by his band. There, she met the prince she had been admiring for many days. After becoming drunk, Tomoka confessed her love to her prince but problems arise with Tomoka having to take her love down through a dangerous path.

From Senpai Scans:

"Girls who like to lie, come to my salon." Arisue Rio firmly believes in the principle that "the outside is the most important." When she says that to male nail technician Nojima Yoshitsuki, he puts a specially made, cursed gem on her nails and told her: If you kiss a boy you don't like, then time will rewind.
Rio didn't believe it but after being confessed to by a suuuper cute kouhai, they started dating and kissed! After they kissed, time rewinded to the day before?!

From Hoshikuzuu Scans:

Detective Hishima’s lover is former colleague and detective, Enokizu. He is still sore over an unresolved incident that occurred 3 years ago that caused Enokizu to quit his job as a detective. The story of heart-throbbing, imperfect love.

The daily lives of an extraordinarily jealous (yandere) girl, Hiyori Koharu, and her boyfriend, Minoru Fujito Original Comic: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=44979493 Motion Comic: http://mcs.ensoku.club/con/965?from=rankingBox&culture=en_US