From PopulationGO

Sorato Kenzaki is an ordinary boy whom attracts not so ordinary women. He constantly gets confesses to by weird, and often dangerous, girls. So when a rich ojou-sama asks him to become a hero he plays along and agrees. But lo and behold he actually gets transformed into a superhero!

From Go! Comi:

On the distant planet of Deloca, teenagers enroll in an education system like no other – a mobile journey that takes place onboard a train. There are standard School Trains for general studies...and then there's the Special Train, an expectional institution whose students receive anything but a normal education. Reiichi is a student contented to obediently follow the tracks laid out before him…but when Arena, a rebellious girl with a mysterious past, enters the scene, his life is completely derailed! While dodging the persistent investigator after Arena, Reiichi and his unintended partner-in-crime experience a school year never to be forgotten.

From Liquid Passion:

The last thing Arata expected was for his cousin that he'd almost forgotten about to show up on his doorstep. But it soon becomes apparent that Kazuto is not what he appears to be.

A bizarre one-shot by Takato Yamamoto. It was featured in Ax: Alternative Manga.

Warning: Ero-Guro of a male teen...

Towakan is a collection of stories:
1) Amaenbo Joker
2) Tokimeki Quest: Two schoolgirls are invited by AV scout from 25th century to film an ecchi-filled fantasy adventure.
3) Rosehip Diary: Yuri drama involving a gymnastics club where second-year students mentor first-year students, and in the mean time, have special relationships...
4) Chikyuu no saigo no hi
5) Erectic Security

From Operation Boredom:

Jin, son of a Count, has a dark past that follows him everywhere. Now a pirate, he's recently acquired a new set of slaves to sell. However, one of them, Lisa, sparks something inside Jin. Could she be the one to get through his cold, ruthless, and dark heart and see what's really inside him?

From Esthétique:

Kosumo has a serious medical condition that has kept her in the hospital ever since she was a child. Since Kosumo's blood type is rare, it impossible to find a donor.
While Kosumo is on the verge of death, out in the city, the 99th Generation Miko, Himiko-sama, gets into a terrible accident while trying to save a child. She is rushed to the hospital, and there her fate crosses with Kosumo's.
When the hospital discovers that Himiko has the same rare blood type as Kosumo, they decide to make her a donor, since Himiko is sure to die as a result of the accident. Kosumo recovers and moves back to Tokyo, but later finds out that Himiko's blood isn't the only thing flowing inside her…

The beautiful and prosperous ancient land of Terresia is being destroyed by the Devourer, a demonic creature from another planet. The World Tree, which created and protected this magical land, is wasting away from the Devourer’s continuous attacks. The World Tree uses what’s left of its strength to call on the world’s last hope in a dark battle of survival – you.

Popular for Junjou Romantica, Shungiku's earlier works were more samurai romance/yaoi of this sort. Here we have a basic spoiled brat and his bodyguard developing feelings for one another.
by Yasha

1) Tour Shangri-La Tour. 1
Hirastuka and Matsuzono have been friends since college, but Matsuzono harbors secret feelings for Hirastuka, but as the heir to the company they both work at, Matsuzono's step mother opposes any relationship (be it friendship or more) between the two. She calls for Hirastuka and offers him a choice - never see Matsuzono again or become the tour guide to a Shangri-La trip and all that it may entail...

2) Tour Shangri-La Tour. 2
Kanou has traveled the world and seen many things, but the one thing that has haunted him for years is the sight of his father making love to a young man. The image burned into his memory is that of the young man, whose body pulsated with pleasure, and Kanou dreamed of being the one giving the pleasure. As a present for beginning a career, Kanou is on Tour Shangri-La, where any dream can be fulfilled. Can the tour guide Asada help this dream become a reality? And why has Asada, who hasn't been a tour guide for years, decided to accept Kanou's tour?

3) Tour Shangri-La Tour. 3
Daichi and Housei are step brothers. What started as a biker gang showdown between Housei and Daichis respective gangs ends in Housei raping Daichi as part of a ritual punishment for the loser. However Housei isn't happy to leave it at just once and continues their relationship until Daichi escapes. Now Daichi is a Shangri-La tour guide, and it just so happens Housei is his next client!

4) Tour Shangri-La Tour. 4
Kashii would often visit a small cafe where Hiroki, a young cook worked and before long Hiroki began to yearn for Kashii's approval of his cooking. However Hiroki decides to take on the job of a Shagri-La tour guide in order to experience and learn foreign cuisine after hearing that Kashii has a 3 star personal chef at his disposal. Kashii finds out about Hiroki's sudden change in job and follows after him, taking the place of the first client - and his first request is that Hiroki become his personal chef for 3 days.

5) Safari Act. 1
Kazuki is a half-human werewolf, Akira is a legendary pure white wolf. They fall in love, but Kazuki as a half breed is considered an outcast in the tribe. One day the tribe tells him to leave so that Akira can get a real mate. Kazuki, recognizing the truth of their words leaves and takes on the life of a normal human, even becoming a teacher at a school. Yet, five years later Akira reappears in Kazuki's life.

6) Safari Act. 2
Story about a veterinarian and his love for a particular breed of cat. Satoya owns and runs the Satoya Veterinary Clinic alongside his adorable assistant Minami. After a customers' criticism over Satoya's favorite breed, Minami becomes quite upset. What's hiding behind his reaction?

Vol. 1 - Somehow Nagi Tokieda, a student of a prestigious boarding high school, Ouka Gakkan, is loved by Yuushi Kitou, a perfect sophomore, chosen as a president of the school council though he is still a 2nd year. Nagi is a lonely boy, dumped by his real parents, and is always very sensitive about people's affection to him. Yuushi plans Nagi's birthday party to encourage him. But hearing the news of Nagi's father returning home, he suspends the party. It was a false alert. From shock, Nagi follows some strange students of another school without any definite purpose and gets into danger.

Vol. 2 - Many allies and even more enemies… A scandal breaks out surrounding the tremendously popular, charismatic, and beautiful student council president! Under the scrutinizing and hostile eye of the journalism club’s Katakura, Yuushi’s plans have been recalled. On top of that, Yuushi’s become the target of the ever-capable and ever-cool vice president Takamura’s rabid fans’ jealousy!! How will he respond to their constant criticism?! [from Juné]

From iskultrip Scans:
Due to the influence of the "Dragon veins", some young men and women awoke as "those with power". They'll discover their "star of fate" in a struggle to the death with the "oni" attacking Tokyo!!! The super popular action anime has become a fantastic comic!!

It's the story of a trip from a teens league of friends in Tokyo of the 80's till today, mirroring their paths and relationships.

A collection of oneshots:

1) Touch Me Again
Seven years ago, Touda and Oshikiri crossed the friendship line once. Right after that incident however, they chose to pretend nothing had happened just so they could go on being best friends. But life is never so simple and seven years later, they begin to see the strains in their relationship show.

2) Iki wo Tomete,

3) Heavy Sugar no Iyagarase

4) Candied Lemon Peel

5) nuotatore nel cantero!

6) Stars Spica Spectre
Kiji is paid a visit by the ghost of his dead friend, Osaka. Although Kiji sees Osaka, it is only an afterimage of his friend, as Osaka's spirit is actually in Spica, a star that is 260 light years away from Earth. As a result, everything Osaka says goes through a time lapse and Kiji only hears him after the afterimage disappears. This is a sad, poignant story about two men who never found it in themselves to confess to each other until it was too late.

7) Ushi Meshi

8) touch IT again, again, again & again

9) I cannot breathe without U

10) lemon crush, bitter & sour

11) Spica no Su wa Sushouyu no Su

Two friends watch a couple making out and one of them, Mayuki, wonders why a couple would do such simple things. Her friend, somehow asks her to "try going out" with her. And many complicated things awaits...

Junya still has Kyouichi’s handkerchief from a long time ago when they met. But now, after their parents got married to one another, they meet again this time as step-brothers. Junya wants to return the handkerchief, but isn’t sure that Kyouichi remembers him or that fateful night. Kyouichi also has unusual pains that suddenly develop and the only one he can contact is Junya. Are these pains just an excuse to be able to touch his step-brother?

English publication via Renta!

From Manga Art: During the 31st year of Seika, the battle between the Library Force and the Media Improvement Committee reached a new level of violence. Each group has armed itself for either the freedom of expression or the "protection" of society from the bad influences of media. Kasahara Iku joins the Library Force with the intent of finding her "Prince" who helped her during a censorship exercise by the Media Improvement Committee and with her strong will of protecting books.

1-3) Torokeru You na Kiss wo Kanadete
For two years, Neo-chan has been dating the vocalist Gaku. After their first night together, she writes and sings a song which overflows with her feelings for Gaku. After hearing her song, Gaku seeks out Neo’s talent… but when things become serious, a dangerous mood develops. The two then lose connection for 3 months. During that time, Neo finds out that Gaku has a major debut with the song she wrote?!

4) Owaranai Koi o Sasayaite

5) Ban confessions!

A story about a girl with a special "gift" in the form of a single wing on her back. She's lived her life behind closed doors, trying to hide this gift from everyone else.
She tries to lead a normal life, but on her first day of high school, her secret is found out by another girl...