From Evil Flowers:

For Ran, love never goes well. She is having an affair with Tabuchi, her married boss, and once, when they quarreled, she was saved by Kazuya, a man she used to be in love with a long time ago. Kazuya used to be a close friend of Ran’s brother, but one day, he just disappeared. Ran had been drawn apart from him since then. After their reunion, Ran’s old feelings came back to life. However, there are many dark rumors surrounding Kazuya. Ran tries to find the truth, but a dark shadow is starting to settle over her life as well. What could be the reason for this…?!

From Midnight Scans:

Seri is a very happy, simple girl. The only thing that bothers her is her marriage to her fiancee, the super-obocchama, Yuzuki! While they both repel each other, Seri happens to notice the strange creatures behind Yuzuki!!

Ever since she was a little girl, Hatsuse Nanao has had trouble making friends because she can see ghosts and demons that others can't. She thought things might improve in high school with new classmates, but the rumors have somehow started up there, too. Finding all the stares and whispers uncomfortable, she feigns being sick to skip school for a few days, and runs into a strange little boy at the park who knows her name and demands to spend the day with her. While trying to figure out who he is, she's discovered by Yatou Kaname, her class rep, who lets them stay at his place for the night. Who is this strange little boy and why does Yatou seem to so strongly hate even the idea of sprits and demons? Nanao finds these answers in both her own past and Yatou's.

26 years ago, in a third-year classroom of a middle school, there was a student named Misaki. As an honors student who was also good at sports, the charming girl was popular with her classmates. When she suddenly died, her classmates decided to carry on as if she was still alive until graduation. Then, in the spring of 1998, a boy named Kouichi Sakakibara transfers to that classroom, and he grows suspicious of the fearful atmosphere in that classroom. In particular, there is a beautiful, aloof girl named Misaki Mei who wears an eyepatch and is always alone drawing pictures.

From AQUA Scans:

"In an accident at the meat factory, the heiress was heavily injured. Guiltily, I agreed to her request, but this very same request have let me enter into a wonderful life..."

From Storm in Heaven:
There is a special organization known as "anonymous" which takes children and raises them without names, without feelings, without souls. Then it sends them out to kill. Can emotions get through to these cold-hearted killers?

A sequence of stories that deal with a few of the organization's members.

Collection of short stories:

1) Anohito to Nitenai Kuchibiru
Kaji was in love with his sempai for years but his sempai got married and had a child. Kaji takes care of the kid and watches him growing up...

2) Kuchibiru Kara Biyaku
Sequel to Anohito to Nitenai Kuchibiru

3) Blood
When their father dies, the rival half brothers must sort through their feelings of anger, regret, pain and desire that their lives have been steeped in thus far...

4) Kagari Oni
An exorcist solves a mystery involving demons. Not really a romance, just a historical fantasy story.

5) Datenshitachi no Yoru
S&M relationship between step siblings is taken to extremes.

6) Double Snake
A former gangster has turned into a regular office worker, but he still sleeps with his gangster lover. But one of the newbies doesn't like the fact that his favorite 'boss' is having a relationship with an office worker.

From Sugar-Oasis: "I wish I was born in a normal family..." A high school girl, Sakamoto Kina, is one of the nine children in her family. She's so embarrassed that she can't tell people that she has such a big family. Of course, she can't tell Noguchi-kun, her crush, either... One day, Kina's mom, who is usually energetic, suddenly collapses...!!

A guy name Hikaru working in a gay club suddenly by accident met his senpai, Takano from high school. But it seems like Takano doesn't remember him. Meeting each other again in such a odd situation, although Takano doesnt remember Hikaru? What will become of them?!

From JShoujo Scans:

Yuzuru, has been in love with her older brother, Fuyuhisa, for as long as she can remember. But when he finds out her feelings for him, her world is shattered when he tells her he can't return her feelings. Fast forward half a year, she's trying to move on and find a new love, but she just can't convince herself to forget him...

Also contains the oneshot: "Fireworks for Oku-chan"
Oku's always been the strong-headed, independent one of the family. With a mother and step-father who are rarely ever home, she'd been in charge of taking care of her younger brother from a young age; she's had no time for love---that is, until she ends up falling head over heels for her younger brother's friend.

Yuuya, a high school student, unexpectedly bumps into Kiriya-san while walking down the street and ends up saving the older man's life. The two are neither "friends nor lovers," but form a companionship in order to listen to each other's troubles. Will this friendship turn into love?

From Bliss:

Ever since Hidetoshi told his best friend Kengo that he was gay at graduation, and Kengo responded with "we'll always be friends no matter what,” Hidetoshi was determined to keep things that way. Though Kengo realized that Hidetoshi probably wanted to confess to him, he keeps his mouth shut in fear of ruining their relationship. But when Hidetoshi gets involved with an abusive boyfriend, Kengo feels that he can no longer just sit back and watch…

1, 4) High-school student and tattoo artist Tohru is holding a secret love for his friend. So when he's confessed to by his junior he turns the boy down flat. But Katsumi isn't one to give up easily.

2, 5) Former students and current sensei's Kikawa and Meguro had a relationship as children. But that was all over years ago, right? So why can't Kikawa stop thinking about Meguro?

3, 6) Student Katahana can't help but wonder why his close friend Tohmune always wears an undershirt. What exactly is he trying to hide underneath his clothes?

7-10) All the romances intertwine as we see a little of each couple in each story.

From Chibi Manga:

After being broken-hearted 3 times, in Kozue's mind, she no longer needed men anymore. But she unconsciously started to care about this mature and considerate Asano-sensei. After knowing Asano-sensei cherished and loved his girlfriend so much, she then discovered that she fell deeply in love with Asano-sensei...

Even though being rejected by the teacher, But Kozue still couldn't forget her love and the romance for the teacher......!?

From Sherbet Lemon:

The main character Hansul, a high school student in grade 10, has never had a boyfriend before in her life. She starts dating Sulgyo in order to buff at her teasing friends. However, as their relationship got more and more stiff, she starts arguing with him. The argument ends awkwardly, and a sweet romance started because they actually fell in love with each other already.

Adaptation of novel Anne of Avonlea (1909) by Canadian writer Lucy Maud Montgomery and it's a sequel to novel Anne of Green Gables (1908). It follows Anne from the age of 16 to 18, during the two years that she teaches at Avonlea school. Anne discovers the delights and troubles of being a teacher, takes part in the raising of the twins Davy and Dora and organizes the A.V.I.S. (Avonlea Village Improvement Society), which tries to bring improvements to Avonlea with questionable results.

Anne leaves Green Gables and her work as a teacher in Avonlea to continue her education at Redmond College in Nova Scotia. She tucks her memories of rural Avonlea away and discovers life on her own terms, filled with surprises… including a marriage proposal from the worst fellow imaginable, the sale of her very first story, and a tragedy that teaches her a painful lesson.

From ADV:

While trying to bury the body of his mother deep in the woods, high school student Yuri is approached by a strange girl who offers to help him. That is... if he promises to be her "parent killing assistant." Meet Anne Freaks, a bright, attractive teenage girl normal in every way - except that she's on a mission to kill her father, the leader of the dangerous extremist cult: the Kakusei Group.

From: Easy Going Scans

A rumor goes around school about an abandoned amusement park and a magician who lives there that can make someone disappear for good. Yoon Ah-ee, a girl struggling to feed her sister and herself everyday will experience her life change as she meets a mysterious magician.

From Girls' Generation:

After the remarriage of his father, Takara finds himself becoming the eldest of the four siblings. Wanting to try his best as the oldest brother, Takara ends up stumbling and tumbling with his relationship between his three younger siblings. Each chapter tells the tale of how Takara bonds with each sibling.