This series of stories started as just the oneshot Pure Love Strip, and then Doting Love Strip and Lavish Love Strip were released.
From ShoujoMagic:
Pure Love Strip
Yuuko is in her third year in Junior High (freshman in high school in US). She is a glasses wearing...four eyed nerd. She’s suddenly getting tutoring from perfect Ryuunosuke-kun, but that is not the only thing that Yuuko is getting tutoring for...Yuuko’s dangerous summer hoilday is about to begin!
Doting Love Strip
The continuing story after Pure Love Strip. After their first time.. he has started wanting it... every day!?
Lavish Love Strip
The continuing story after Pure Love Strip and Doting Love Strip. Perhaps the smuttiest installment so far? Yagami is tutoring Yuuko so that they can be in the same High School... But is his need for a wild sex life going to interfere with Yuuko’s studies??

Kouji’s mother has just remarried, and as a result, he has a brand new father and two unbelievably beautiful twin brothers. In order to get to know his new family better, Kouji transfers to the same private school that his newly acquired step-brothers attend. But when Kouji finally meets them, the two have completely opposite personalities! And it seems like one of them is intent on being more than brothers!?!

Volume 1:
Nozomi has a childhood friend who is 7 years older than him, Mitsuru. Mitsuru not only teaches him how to study and play, but also teaches him how to kiss and masturbate! Nozomi wants to lose his virginity by having sex with a girl, but the only thing he can think of is doing it with Mitsuru. On top of that, he was harassed by an idol named Yuuma, while he himself uncontrollably harasses Jin who is younger than him. How will this continuously complicated love end?
Volume 2:
“We’re at an age when sexual curiosity is high! My name is Nozomi and I’ve always wanted to date the one I love. Not just going out for an evening stroll, but to do the things I love with him.” Although this is in Nozomi’s mind, he still can’t bring himself to say it. When will my dreams come true!? My heart is overflowed with hope, and I can’t live without a man... whose fault is that!?

There is a rumor around school about Houjyou Aika giving birth to a child at the age of fifteen, just now returning to school about a year later. Reality is far worse than the gossip. Aika was raped by the demon ruler (Suruga) and she somehow survived long enough to give birth to a boy. The half-demon was taken to the ’real world’ (aka demon world) by his father and imprisoned in the “Cliff of Time“. During his time there, Kai was a plaything to his elder brother, Kaiga.
This is a serious series with rather violent, bloody scenes. The demons have no morals, seeing the human world as a big playground and sex with anyone is just fine. The only mistake Kai made in his life was existing, and he is constantly punished for it. If you’ve been looking for a dark, convoluted series with great artwork to read, Lumen Lunae would be a good choice.

A collection of 3 tales of Dyne and Ghaleon and the Great Inheritance of Vane a magical airship, pride of the flying city of Vane.
- The Scenery I Recall: Dyne and Ghaleons first meeting in the town of Burg.
- Confession of the Soul: While travelling Dyne and Ghaleon help to rescue the Guildmistress of Vane.
- The Memories I Confess: Ghaleons journey to complete his brothers last work the Great Inheritance of Vane.

A new installment in the long-running “Lupin III“ series! Arsène Lupin III, the world’s greatest thief (or maybe just the world’s goofiest thief) foils his rivals and pulls off insane heists with his oddball crew of professional crooks: gunman Jigen Daisuke, samurai Goemon Ishikawa XIII, and femme fatale Mine Fujiko.

From Damn Feels! x Paperdolls Project x Winter Translations:
Yusu is a fun-loving girl with a casual sex life but likes to sleep alone at night. When her innocent colleague, Seta, catches her attention, she decides to make an exception...

A high-school boy named Manaka Hiromi is given the magical power of the Red Garnet Princess to defeat the Devil King who is trying to escape Hell (or something like that). Unfortunately for him he’s also given the sort of body that comes with the job description.

Yaida Masaki is a part timer, working as a janitor in a large publishing company. His hobbies include fantasizing about other girls, masturbating, and creating cosplay outfits for his fantasy girl: Oikawa Maiko. She is the daughter of the company president, and a far away existance for Yaida.
Recently, Maiko has awoken to her magical powers that were asleep inside of her, but she has trouble controlling them. More often than not, she ends up completely naked and either unconscious or unable to move. Maiko’s mother has assigned Yaida to be her guardian and mentor to train Maiko to be able to control her powers. Will Yaido be able to train her to control her powers and become a proper magical girl?

Spiin-off series based on Komi Naoshi series Nisekoi.

Shunpei Closer’s grandfather, Alsyd Closer, was an odd man. He traveled around the world always coming back to Japan to tell his grandson all the amazing adventures he would have. Before leaving to Africa on Shunpei’s 7th birthday, he gives him a teddy bear named Hyde. Six years have passed and one day Shunpei receives a mysterious package that contains a deadly surprise. To survive, he will learn more about his grandfather than he ever dared to dream and learn what it takes to be a real man, and not the coward he always thought it was all right to be.

From Storm in Heaven:
Magicians, people with magical powers that have caused their kind to be hated and feared throughout the centuries. This manga contains their tales -- of magic for both good and evil, the struggle to fit into society, and a dark past that haunts them both.
The series includes:
vol 1. Romanesque Variee
vol 2. Mystic Variee
vol 3. Classical Variee
vol 4. Sweet Variee
vol 5. Silouette Variee
vol 6. Crescent Variee
vol 7. Secret Variee
vol 8. Fantastic Variee
vol 9. Nostalgic Variee
June’08 dropped by SiH

Teenage magician Kaito Kuroba has a secret identity: that of Kaitou KID, a famous internationally-known and wanted “phantom thief“. Kaito took the identity after one day discovering that his late father was the original Kaitou KID. Later on, he discovers his father, who died from an ’accident’ during a magic trick, was really murdered because he would not steal the jewel Pandora for an evil organization. As Kaitou KID, Kaito tries to find Pandora before that organization that killed his father do, and destroy it, leading Inspector Nakamori and his task force on the wildest jewel heists imaginable!

From Midnight Sonata Scans: Airu is a clumsy and scatterbrained girl. She was looking forward to a flowery middle school life, but due to her being from a ’family of witches’?, she was admitted instead to Mahoraba Academy. In a strange school without any friends, the lonely Airu encounters strange people who use a special power called Maho...!? A magical school life begins!

From FairGame (JCafe24):
Magical rod “ryin rod“ has been awakened. When the compatible user “magical girl pretty bell“ appears, it always says that the world will be at risk. Milk and Cocoa are angels who protect the rod and support magical girl pretty bell, They have come to the town where a compatible user, Misaki Eri lives, while being attacked by an enermy. However the rod didn’t point to Eri but pointed to a body building neighbor, Takada Atsushi. why did the rod pick Atsushi instead of Eri? and why there are two compatible users?

A collection of stories:
? Otonari no Senpai
? Fuwafuwa no Kimochi
? Hajimari no Kotoba (also in Kirakira no Natsu)
? Hon no Tomodachi
? Mainichi no Tomodachi
? Christmas no Yoru (The Night Before Christmas)

The chivalrous thief Chloe spends her days and nights acting on behalf of those in need, resulting in her being seen as the hero of the poor, but Chloe herself feels guilty thinking of how a mere thief like her is regarded so highly. However, meeting the witch named Meifa will change her fate.

This is a world where all witches were “hunted“.
The “witches“ who appeared several decades ago were the subject of “heresy“ as a bad existence harming people. There is a young boy who had a doubts about such this common sense, Hayato Arai. witnesses the “Witch Stigma“ suddenly appeared on the arm of his childhood friend to be a witch by chance. Hayato struggled to protect His dearly childhood friend from the church that continue hunt down of witches. However before He think a way to save her, A witch hunting unit of the red line church appears!

Hiromi is a high school girl who has never had a boyfriend but has always enjoyed matchmaking. Riko (her younger sister) is experiencing her first love. To make it a success, Hiromi tries to find out who is the special someone in her sister’s heart. To her surprise, it is Nan--best known to be the school’s most flirtatious guy. It would appear that Hiromi has to face her toughest matchmaking challenge ever.

[From Omanga]:
A research laboratory in the international city Kanazawa. Kei Sagami, daughter of the chief of laboratory, Professor Hiromitsu Sagami, becomes a witness of an experiment - the awakening of a sword, the Maken. It’s able to heal mental disorders, at least according to her father. But as strange foreigners forcibly break into the laboratory, kidnap her father and put the actual carrier of the sword out of action, she experiences the true meaning of the Maken first hand.

Takao-kun is deeply obsessed with his older brother - a clumsy but nice teacher.
His brother suddenly has some serious problems because of one student. Takao decides to become friends with this rich and annoying boy to help out his brother. Will he succeed? Who is the mysterious brother-stalker?!

Morita, a hopeless otaku, falls in love with his popular classmate, Sakura. As his otaku approach to woo Sakura collides with reality, things heat up. Will he be able to become the man that Sakura desires?
A sexy and funny story about the reality of love.
(Adapted From) Erotikku ni Oborero!
(Sequel) Chou Maniac ni Aishite

The great demon Mao Dante, exploiting the weakness of a boy exposed to his demoniac influence in the dreams, is awakened from a thousand years sleep.
The will of this being, a survivor of an ancient and forgotten civilization , is to wipe out the whole human race.
Anyhow nothing is so simple: the motivations of the demon aren’t soo wicked as one could think and they will combine with the life of the boy which hangs between nightmare and craziness.
In the meanwhile the satanist will fight against the hierarchy of the church to obtain a justice which is, as it’s easy to guess, that of the demon Mao.
This series didn’t have an ending until it’s remake in 2002. Nagai took many ideas from Mao Dante into Devilman.

This series is a complete remake of the original Mao Dante, with new designs an a story slightly inspired by the anime of 2002. This time, the timespan of the story i longer, the character design is different, and all unanswered questions left when the original series was interrupted, are answered. This time, Mao Dante has a proper ending.
The story is divided in four parts: Kami Ryaku Hen, Gen Ma Hen, Mado Hen, and Kami Ma Taisen Hen.

After a long and treacherous journey, our Hero finally arrives at the Dark Lady’s castle only to find himself being asked for help. The Hero explains how the war that the demons have brought upon the humans have killed thousands and put more in misery. The queen of demons however argues that this war has made the human society band together as one and showed empirical evidence how it has increased population, increased production, boosted economy and improved society overall. Furthermore, she explains to the Hero that ending this war will result in a civil war that will produce more bloodshed than there ever was. The Hero, convinced that the only way to bring peace, relatively speaking, is to join forces with the Dark Lady, agrees to help with her plans!

“Infection“ is about the conflict between Sei’s feelings for Youko and her fear of getting hurt.

Nagumo Yumi is an idiotic high school girl, whose post-graduation plan is to go to the US and become president. To her high school friends’ amazement, she actually manages to make it to the US during summer vacation. After befriending some elderly veterans, she becomes convinced that joining the Marine Corps is the best way to move her dream forward. The waitress Linda Crawford joins her to sign up at the recruitment center, and she also meets friends among the new recruits, Rita Fernandez and Donna King. Will they have what it takes to become a Marine?

Lin Dong, a child of an offshoot branch of the Lin Clan finds a mysterious Stone Talisman inside a cave. From then on Lin Dong’s destiny slowly begins to change.

From Shogakukan:
Rinka comes back to the town where she used to live during her childhood. She looked forward to seeing Shuta again, who she used to protect from being bullied. Now, Shuta is the school’s board chairman and he is very popular with girls. Rinka becomes confused because Shuta is very different from before...
Includes Side Story Give Me A Sweet Kiss (Amai Kisu wo Choudai)
(Marugoto Ore no Mono Sidestory and Marugoto Ore no Mono Special remain unscanlated.)

From Chibi Manga:
Ao moved from Tokyo to the country. She’s not used to rural life, and leads a boring school life.
She’s collapsed often from a headache, and each day is filled with troublesome things...
Then there is Araya-sensei, who encourages Ao’s true intentions. After meeting sensei, slowly she is fitting in. But even so, do you know that Ao’s mind withering away?

Short story about two guys, who usually watch films together. The story tells the older guy’s thoughts.

From Liquid Passion:
After getting into the super-elite private school, our uke has to be the Student Council President’s ’servant’. When the President’s rival is also interested, trouble is on the horizon.

From StarryHeaven:
When you have worries, is it about whether or not you are short or about your new class? Those were the problems From StarryHeaven:
When you have worries, is it about whether or not you are short or about your new class? Those were the problems that normal high school student, Chiyoko, faced. However, one day she meets her childhood friend Chiharu and Chiyokoa€?s world changed. But when Chiyoko stumbles her way into a secret underground high class club, she is surprised to find the trutha€| that normal high school student, Chiyoko, faced. However, one day she meets her childhood friend Chiharu and Chiyoko’s world changed. But when Chiyoko stumbles her way into a secret underground high class club, she is surprised to find the truth…

From MangaHelpers:
Kamiya Hiroki always thought women had it easy. This thought was throttled by the fact that his 24-year-old sister does not work and plays games all day. Why couldn’t he have it this easy? He wanted to become a woman and be lazy like his sister. After blogging about his rants about his sister online, a mysterious reader comments on his blog, stating that there are ways to swap bodies with others. This would bring Hiroki’s dream of becoming a woman to reality . Unfortunately for Hiroki, swapping bodies had unintended consequences when he returned to his own body. [DrCoke]

[Taken from ShoujoMagic] :
A collection of Shinjo Mayu’s earlier (and less smutty) short romance stories.
1) Bare the Heart (Kokoro wo Hadaka ni Shite). Mina is a high school freshman with a crush on her math teacher...who also happens to be her cousin Yukiya! Mina has always been very precious to Yukiya, and at times it seems like he can see straight through to her heart, but can he ever see her as a woman and not just his cute little cousin? How long can Mina’s flirtations go unnoticed by Yukiya (or by the sadistic and lascivious chemistry teacher, for that matter)?
2) A Vampire at My Neck (Kubisuji ni Banpaia). Be careful when you go groping in the dark...you might just find a vampire! That’s what happens to Hitomi. Now she’s attracted to Kairi despite what he is. Or is it because of what he is? Kairi has a powerful charm...but is he too charming? Dangerously charming?
3) Hold Me, Melt Me (Dakishimete Tokashite) Ryou is a high school sprinter who’s racing for a different kind of goal--his pretty track manager, Airi! He says he wants chocolate from her on Valentine’s Day, but...is that a delicious metaphor for something sweeter? Whatever the case, it melts in the mouth!
4) Examine Me Gently (Yasashiku Mite ne). Sanae just had her appendix removed. But while she waits in post-op for her surgery wound to heal, she starts to develop another malady--love sickness! And her handsome new attending physician, Dr. Touya, is the cause! What can cure Sanae’s ailment? ...A sponge bath, maybe?
Omake: If you have ever wondered why Shinjo Mayu’s female characters have such big breasts and why her heroines seem so young...then you must read this omake! It is a great insight into the mind of Shinjo Mayu!

Robert Johnson did not invent the blues, he merely refined it with such skill that he became the most famous and influential delta blues singer in history. There is a well-known legend he gained his skill by selling his soul to the Devil at a lonesome crossroads late at night. This manga is an account of his life that doesn’t intend to be historically accurate.
Note - This series was discontinued at 4 volumes.

In front of Mochizuki, a normal high schooler, appears a wounded girl named Mayuki. Mochizuki takes her to his home and finds out that he has gotten himself involved with a war that goes far beyond any human comprehension. One after another, Mochizuki and Mayuki confront girls that bear an unfortunate destiny, to fight to the death. Mayuki and Mochizuki are left with no option left but to fight.... Here, a new storyline is unveiled!

Haruse Yui ends up becoming the new landlord for her grandfather’s apartment. But it’s no ordinary apartment because all the tenants wear glasses and thus it has been dubbed the glasses apartment! Not only that, the tenants aren’t what they seem?
Also includes:
Otokomae!
Dakara Suki to ka, Kirai to ka
Ojou-sama’s Clinical Records
From Shoujo Crusade:

Ataru, a young man who lost his life in an unfortunate case, receives three special powers from God and reincarnates into a different world. The strongest gun, the ability to create bullets freely, and the ability to see everything called “magic eyes“. Atal, who is the only gunner in this world, casts himself into a supreme supple adventurer guild with the beastman girl Caro who is rescued from slavery and takes on Atal. The sniper’s up-and-coming hero who eliminates any enemy with a single blow, opening from here.

Erika Klause, who has been separated from her brother when she was little, decided to enter Rosenstolz Academy (in Germany), where she was sure to see him. But what she encounters at first day of school is the five Strahl (King scholars) candidates, and three new girl friends, as well as tons of rumor-mongering classmates xD. What could possibly go wrong at finding a long-lost brother in an exclusive school?
Yuki Kaori did the original character designs.

This series collects all of the short, unrelated side-stories that get drawn by Gosho Aoyama’s assistants. These stories are all separate from the main plot and don’t follow any kind of over-arching continuity.

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...

“The 20th Century saw a massive conflict between humans and Monsters, with the Monsters winning the hard-fought struggle. As a new century dawns, memories of those times have utterly faded from the minds of men.“
Monsters rule from the shadows, while humans continue life with a semblance of normalcy, all the while in secret fear. Some try to win favor with the Monsters, offering sacrifices of children. Most turn a blind eye and pretend they don’t exist. But there are a few, the Melos Warriors, who continue to fight the Monsters and seek the Melody of Oblivion, a mysterious girl said to hold the key to salvation.
Young Serina Bocca awakens as a Melos Warrior and begins his journey in search of the Melody of Oblivion.

Chibana Manabu has a habit of closing his eyes and counting to three whenever he finds himself stressed out, whether it’s about his drag-queen father or the feelings he’s harboring for his childhood friend. Kaji Hiroto is carefree and enjoying his days with Chibana, hoping they’ll last forever and maybe even turn into something even more eternal. But lack of communication and a fear of rejection can only lead downhill.

From Lovely Strange Dark:
What circumstances might drive someone to create a clone that copies even their memories? A replacement so perfect that even the clone won’t realize he’s a clone? Nanako once took Louie up on his offer and had him create the perfect replica of herself; now she stays at his side, witness to the mericlones that he creates. Beyond the stories of the individuals he “saves“, who exactly is this man playing god, and why does he do it?