From Mad Hatter Scans:

The romance between the Incubus’ aide the Lizard (Gray Ringmarc) and Alice. Once a capable assassin, now a sensible and mature adult. Alice thinks herself just a child beside him, incompatible with him despite her attraction to him… A manga adaptation of the otome game Clover no Kuni no Alice that focuses on Gray.

Anise can't believe her luck when she finds herself in the same high school as famous former child star Siva. Although the cool and handsome Siva seems unapproachable, Anise manages to become his friend. But her happiness turns to surprise when she discovers Siva's secret: for years, he's been switching identities with his twin brother, Cipher!

Shin Gyu Yun is the heir of the Shin Oong Group and the self-proclaimed prince of Korea's economy. However, he has a secret. Since his father left them before Shin was born, he can't help but clean things due to his past of helping out his mother with the chores. It wasn't until that Shin's mother died in an accident that he came to know his scheming step-sisters by moving into his father's estate. The step-sisters conspire to make him lose his position... but could that have made him fall in love with a low-class girl?

From Attractive Fascinante:

1) Two History Teachers

2-2.5) The Crisis of Yamabuki-kun, The Power of Youth
Yamabuki is an average guy with an ordinary face, average grades, and a normal life and he likes it that way. Then he meets Aonuma...

3-6) The Good-for-Nothing Fellow is Just Good
Odagiri Itaru, an elementary sensei, went to his student, Aoyagi Rikuto’s house for a house visit to find out the reason that Rikuto was always sleeping in class. To his surprise, Rikuto was always helping his mangaka father, Aoyagi Kaiji, on his works. Odagiri always came over to their house to make sure that Rikuto slept on time. As time went by, Odagiri started to have feelings for Kaiji. But would he be able to become that irreplaceable existence in Kaiji’s heart?

Collection of short stories:

1) Crying Silently
When Shino hears some ecchi sounds in the school storage area he never expects to find Koji sensei pleasuring himself. Koji, caught in the act begs Shino to keep it a secret, but what exactly is Shino to think of all this? And when Shino starts to fall in love what is he to do?

2) The Knuckleball of Love
Fuwa is an ex-professional baseball player, so when he is one day approached by a high school baseball coach and begged to train the students Fuwa reluctantly agrees. Can the team be saved and what why is the coach so touchy-feely?

3) Be It Today, Tomorrow or the Day After
Aosaki is a cram-school student but has no ambition. His daily routine leads him to a small store for dinner each night - but one night Renji (the owner) is accused of 'touching' his part timer (high school student, male). Aosaki saves Renji but as a result the part-timer quits. Aosaki, in a flash decision, decides to take over the part time job - but who knew teaching Renji could prove so much fun?

4) Please
Sen is in love with Kuruma a cafe owner and retired stunt man. By what means will he get his love across?

5) Sonjo Sokora no Otoko
Parent meets teacher, is it love at first sight?

6) My Wife's Got a Beard
The return of the second couple from Hey! Doctor. Gorou and Chiaki are lovers and so far have kept it secret from their families. But when Chiaki's parents walks in on them kissing Chiaki thinks its all over. However, upon finding out Gorou is the managing director of a wealthy company they give him Chiaki as his bride!

Cute and child-like high schooler Suzu has an affinity with animals. She wasn't aware of just how much so until the day a large black cat literally falls into her arms! She wakes up after taking the injured cat home to treat its wounds, and finds a naked boy, "Noa" in her bedroom! He claims to be the cat, "Noir".

It appears that someone is after Noir as they are suddenly attacked by cats. Suzu can sense they are being controlled against their will. After their escape Noir/Noa is impressed by her bravery and the fact that she can understand animals--so much so that he asks her to have his babies!

Poor Suzu, what is she to do with this cat-boy who's determined to stay close to her, VERY close? And what of those who are just as determined to get Noir back?

1) Electricity (Denki)
A high school student despairs of ever making friends on account of his appearance scaring everyone off. However, the new transfer student with the unique and 'electrifying' physique shows up in time to prove him wrong.

2) I Don't Wanna Hold On You (Dakishimetakunai)
When middle-aged salaryman Masato is laid off, student Tatsuya hires him to take care of his apartment… and other, more personal services. But when Masato starts to have doubts about accepting Tatsuya's money, what will Tatsuya do to stop him from leaving?

3) Reason For Desire (Yokubou no Riyuu)
The rich and lonely young businessman gets into a scuffle with a castoff vagrant. He gets a bit more than he bargains for when he takes the man in as live-in housekeeper.

4) Secret Knife (Himitsu no Naifu)
Two solitary people walking similar paths, one an assassin for the yakuza, the other a shinigami, meet and find their way to mutual love and understanding.

5) Rose and Knife (Bara to Naifu)
Sequel to Secret Knife. Yato comes upon an old partner who is bent on "reteaching" him how to be a ruthless killer once again. Kamui, however, will do anything to keep that from happening.

6) Keep Up Your Right! (Migikawa ni wo ki wo tsukero)
I Don't Wanna Hold On You omake

1-3) A Hateful Person
Third-year student Bai is the beautiful prefect with an angelic smile - that allures the students into obeying his orders. However, his kouhai Chiaki always defies Bai and the latter has no idea why Chiaki hates him. Nor does Chiaki understand why Bai hates him so much that he never reprimands him for his sloppiness. Each secretly wishes to know what's on the other's mind... but how will they go about it?

4) The Day That Prince Charming Will Come
The pitiful freshman has been dumped for the 4th time even though it has only been 6 months since starting school. While he was thinking that things can't get worst, he gets a bucket load of cold water dumped on him while he was crying his eyes out.

5) Love Rivals
The beautiful bartender has women throwing themselves at him even though he is openly gay and very monogamous. His partner on the other hand, is bisexual and busy chasing skirts. How will he handle his betrayal time after time?

6) Emergency
The lecturer is a man of science, but has his beliefs turned upside down when he accidentally broke an antique and sets a spirit loose.

From Manga Art:
Miyu, whose mom was chosen to be an astronaut, was sent to live with Kanata, a boy she just met. Soon after, Kanata's father leave the two to live alone. Amidst the panic, a mysterious UFO came... and out popped Ruu and his babysitter-pet Wannya. For the sake of Ruu, the four of them start living together......

Every year the flowers bloom. Mysterious Cherry Blossoms blooming all over a crescent shaped island. That island is the island of Hatsune...

The main character who goes to Kazami Academy, Asakura Junichi, has the power to see the dreams of other people in his sleep. He was also taught magic by an old lady that allows him to create sweets.

One day, Junichi seems to have seen someone`s dream again while he was sleeping. Inside that dream, a girl who was a childhood friend of his appeared. But, he was woken up by his sister Asakura Nemu, forcing him to come back to his regular life. Nemu doesn`t actually have any blood relation to Junichi but their bond is deeper than other real brothers and sisters. So deep that it gives the illusion that they`re lovers.

It was another peaceful normal day waking up early in the morning and going to Kazami Academy. Together with childhood friend Amakase Miharu, the academy idol Shirakawa Kotori, the two sisters Mizukoshi Moe and Mako who prefer eating nabe on the school roof for lunch. Going through their day as usual, their childhood friend, Yoshino Sakura, who they thought had moved to America suddenly appears. It was a surprise for Junichi and Nemu. Sakura tells them, "I came to fulfill the promise we made when we were children..."

When he was younger, Kujou Kiyosumi was incredibly awkward and nerdy. One day in elementary school, he courageously confessed his love to a girl, but she told him in front of the whole classroom that he was "disgusting" to be around.

Shocked, Kiyosumi asked the coolest guy in the class, Sagiya Maki, to help him become more likable, too. Thus began the days of training and now in high school, he had finally achieved most popular status alongside Maki. Everything seemed to be going along smoothly until...

Sumi is in love with Mitsuru, but he doesn't seem to be interested in her as a woman. Determined to look more sexy and mature, Sumi takes an experimental growth hormone that her scientist father has been developing. However, the medicine backfires. Instead of changing into a buxom femme fatale, Sumi changes into a beautiful young man! She--he--is so gorgeous and so cool that even Mitsuru begins to take notice. Although the new situation with Mitsuru is imperfect, Sumi discovers that she can be closer to her crush: they can talk man-to-man. Yet, being Mitsuru's friend also has a downside, particularly when he reveals that he is in love with a girl in his grade!

Seung Hun is a handsome playboy who's never experienced true love. Woo Sun is a charming playgirl who wants to be loved for herself and not her beauty.

Jong Yi is the beautiful, mysteriously childlike and vacant boy who becomes the object of their affections. A complex love triangle evolves between these three, further complicated by the involvement of Jong Yi's unfailingly devoted childhood friend and first love, a girl named Yu Ri.

They're all soon to discover that love is a long, painful path...especially if the object of it is completely oblivious to your attentions!

Note: As indicated by the genre tags, there are both shounen-ai and romance pairings in this story. It is not F/M romance only.

From Go! Comi:

When her grandmother passes away, high-school student Kajitsu Toda suddenly finds two hot stepbrothers and an adorable little stepsister dropped in her lap! Kajitsu and her step-siblings have only one thing in common: they were all abandoned by their parents. Against the odds, they've pulled together to form a family without grown-ups. They don't want charity, they don't want pity... they just want their dignity!

Things are particularly tough for Kajitsu and her step-brother Natsu. As kids, they were as close as any true siblings. Now, reunited for the first time in seven years, they've grown as far apart as two people can be. Can they ever become friends again? And can two high school students living together, even as "siblings" ever escape scandal?

Yuuki Ashikaga is a high-school freshman at Sakakino Academy. While working as a student librarian, he grows enamored of Kotonoha Katsura, a girl who frequents the library. Unfortunately, Kotonoha is already dating Makoto Itou, another schoolmate.

The situation is further complicated when Chie, Yuuki's older sister introduces him to Roka Kitsuregawa, her kouhai in the basketball club. Roka becomes interested in Yuuki, who only has eyes for Kotonoha. In order to make him jealous, Roka lies and claims she already has a boyfriend, her former classmate Makoto Itou. Unfortunately for all of them, Roka's lie sets off a chain of events no one could have predicted...

Note: Cross Days takes place in the middle of the original School Days storyline and provides an alternate take on how things might have turned out.

Artist model Nagi has gradually become more and more aware of art student Kaji's meaningful gaze. After working past misunderstandings and miscommunication, the two begin a loving relationship, but even after four months, they haven't moved beyond a simple kiss. Nagi begins to wonder if perhaps Kaji can't accept being with another boy. But Kaji has a secret of his own...

Also contains two oneshots:

• Wish on a Star (chapter 6)
Sei has hated stars since he was little. Will his childhood friend, Daiki, change that?

• Boku no Shôkoi ni Tsuite (chapters 5 and 7)

A former prince and his retinue take Hifumi to a world powered by imagination.

From J-Wiki:
Takashi is reunited with a childhood friend he has not seen in 13 years named Miriko. Miriko, while thought to be missing, became the queen of an alien planet and leader of a strange army corp. To keep a childhood promise, Miriko sets out to take over the world with Takashi. However, Takashi has no desire to do this, so Takashi must stop Miriko's wild behaviors.

From Viz:
A hopeless geek, a beautiful woman, and a fast connection--could the Internet be his ticket onto the express train to romance?
A real-life thread on an Internet forum sparks a nationwide phenomenon! A nerdy otaku meets a girl on a train and posts an urgent query on the Web--How the heck do you talk to girls? What should he wear on their date? Where should they go? The forum's response was overwhelming, and the thread continued to grow along with their relationship.

Collection of crazy tales of love. 1) Electrical Shock Love Machine One of the most beautiful and popular girls in school, has zero interest in boys or romance. That is, until she meets Bansaku. He seems like a very average boy, unless one looks very closely... and Madoka does. She becomes so hypnotized by the little things about him that she loses her good senses, and when she regains them, she finds herself touching poor Bansaku, who has no idea what she's playing it! Madoka has spent her life dodging the unwelcome advances of desperate male love machines... Does Bansaku feel the same sort of disgust for Madoka's long-repressed, electrically-charged lust? 2) My Baby: Morimura Aki's handsome looks attract women by the thousands, but his violent manner keeps them all at arm's length. As an innocent bystander, Moe couldn't have cared less... until one of his outbursts led to her injury! Now revenge is a matter of pride. But when she exacts it, there's an unexpected result...? (No, really, you'll never guess if you don't read it!) 3) Like in Cinderella: When Chiyo lost her job and had to take on work picking weeds for the rich, she never expected to become like Cinderella. But when Yoshimune, the handsome young master of the Tokugawa Financial Empire, runs away from his "castle" with her, that's what Chiyo is certain will happen. But there's no guarantee that these two will live happily ever after, because this fairy tale isn't Cinderella's -- it's Chiyo's! 4) Don't Get Me into It: None of Ichirou's home tutors ever come back after the first tutoring session, but Takigawa Megu can't imagine why -- he's so cute! And... tied down in his chair!? It turns out that Ichirou is a complete and utter brat! Megu makes it her mission to prove herself superior to him, and Ichirou is actually impressed? Now, every time he gives her an inch, he gets her a little more into it. Before long, Megu feels like tutoring Ichirou... in the ways of LOVE!