From Shoujo Crusade:

One day, while in search for more food, our heroine stumbles upon a jar of what looked like umeboshi; little did she know that it would bring her more than just a full stomach. The mysterious snack somehow makes her shrink and she can only grow back when she eats something (which is a bit of a chore if you're THAT tiny). And if that's not troublesome enough, she's also dealing with her crush who seems to like her best friend!?

From Yes_Rhade:

Chuunri's in a predictament - he's newest boyfriend doesn't seem to be interested in being intimate, so he goes to his previous boyfriend for advice. Of course, a little jealousy never hurts to get some action going.

Two girls just started dating at the New Year Eve. They want to make up their lost kissing time and decide to kiss for 6 hours and 5 minutes.

From An Endless Story:

If you ride a train you can see there are a lot of different people. I wonder where they came from and where they are going. I've been able to hear many conversations and I wonder what kind of relationship these people have. I want to talk to them and ask, but I would be weird if I did so I just enjoy imagining it by myself.

Sold into a king's harem, the slave Adele learns that she has become the property of a man rumored to be so cruel that he executes his female slaves after they spend a single night with him. Determined to learn the truth, the brave young woman volunteers to be the next one taken to his bed. Is the man truly a murderer, or is there another reason that so many young women have disappeared from the palace?

From Aerandria Scans:

The small country of Adarshan recently conquered a territory of the Castoria Empire. To create an alliance between the two countries and secure new border alignments, the victorious Adarshan general, Alexid Deke Adars (the king's younger stepbrother), was forced into a political marriage with Castoria's sixth imperial princess Justinia. But she's only 10 years old!

From Basement Leisure:

Kazuma is a shy high-schooler who happens to be gay, and in love with a popular and handsome guy,Ayase! A while later, Ayase befriends Kazuma, having found out that Kazuma is gay, and admits that he too is gay, and has the same feelings for Kazuma! Yet all Ayase does is have sex with Kazuma, causing Kazuma to feel insecure, will this relationship work out, or will Kazuma's and Ayase's heart fall apart?

From Ivyscan:

The Lord of Sanwa's son Lamkha saves Kanan, who collapsed on the road, and brings her home. In Sanwa, where the Messengers of Heaven or Flying Serpents roam the skies, a legend has been passed down the generations. According to the legend, a Holy Dragon fell from the heavens following a battle against a Black Dragon and was buried in Sanwa. What is the truth behind the legend?

A Violinist That has talent and seemingly more connections than he lets on is used to babysit a powerful SS rank illusionist girl she seems to have known him since she was young but he most likely don't remember her. ~ Yeavon

Izumi starts high school on a low note. For some unknown reason, rumors refer to him as the notorious Izumi, a thug who loves to fight. The truth is dramatically different. Izumi is the housekeeper for his widowed father, and spends his after-school free time doing the shopping, cooking and cleaning. He doesn't have the time or energy for friends, so his bad reputation actually is useful.

But what is the problem with Segawa and Sawatari? Why are the school idols always being so friendly with him? Don't they know about his reputation? What sort of friendship do they have in mind anyway? Why does Izumi start to feel like a ham-bone caught between two hound dogs?

From Forever More:
First-year high school student Yuka happens to see his amazingly handsome neighbor kissing another man. However, he learns that the handsome neighbor is his math teacher. Having fallen in love at first sight, Yuka struggles to attract Gotou's attention, but Gotou restrains him with an, "I have no interest in kids."

Also contains a oneshot called Kabuki machi no Otoko (The Man from Kabuki City).

Description from Viz: The story A, A' raises a troubling question: How would you feel if your lover died - and was replaced by a clone? Could you recreate your relationship with someone who was physically exactly the same but didn't share any memories of your life together? In 4/4, teenaged Mori flunks out of an ESP training program. But when he meets Trill, a beautiful Unicorn, his latent abilities begin to blossom... In X+Y, Hagio uses science fiction to explore questions of gender and sexual identity. Time has passed, and once again, Mori finds himself inexorably attracted to a member of the unicorn race - but this unicorn is male... and so is Mori. X+Y won Seiun Award in manga category in 1985

Han Summer (Yeuh-Reum) and Hyun Moo-Heum are very different from one another. While Moo-Heum is a brilliant, yet stunning son of a CEO of one of the most influential and extensive companies in the world, Summer, on the other hand, is a mediocre-looking girl - a plain Jane, who is just under an inescapable debt of 70 million! And to whom? It is none other than Hyun Moo-Heum! In the midst of this dilemma, a mysterious figure enters and intervenes with their lives. Could he be of any help to Summer or is he destined to make her life more complicated than it already is?

If I could describe it in a few words, I’d say “poetic”, “lonely”, and “deliberate”. There’s a touch of the sadness that comes at the end of summer, the transition into cold and quiet. It feels heavy with undertones. Every word seems deliberate and filled with meaning.

Princess Acacia of Libya is engaged to the the prince of Hittite. They are madly in love with each other. But Lamec, the young king of Egypt, while conquering Libya (and killing Acacia's parents) falls in love with Acacia. He brought her back to Egypt with an intention of marrying her. But Lamec is already engaged to the powerful princess of Egypt. It is because of her who gave up the throne for Lamec that he was able to become king. The Egyptian princess throws Lamec into prison because he wanted to break up their engagement. After giving up on changing Lamec's mind, she kills him.
The prince of Hittite came to try to save Acacia but failed. He died while protecting her. The evil Egyptian princess then throws Acacia into a dungeon and opens the water ways for her to drown.

All 4 reincarnated 3000 years later into modern Seoul.

Kieron made a name for himself in the newspaper world through a scoop... and Beth's life, which he'd used to get the scoop, changed for the worse. What made things even harder was that she was now pregnant with his baby. Three years have passed, and Beth's changed her name and is starting a new job. Little does she know that her new boss at the Daily Globe is none other than Kieron...

Sakura Ai, had her first love on Tokuzawa Taiyou during her elementary years. When the sweet and gentle Tokuzawa-kun transferred to another school causing Ai-chan to have a funny nickname "Granny Ai" when he left, Ai-chan tried to forget about him. But fate never gave up even when she was in high school! While Ai-chan went to her garden of sunflowers by the pool in the school, she found a phone lying on the ground. When she knew that it was Tokuzawa-kun's, she left it on the ground and ran away, knowing that the kind Tokuzawa-kun she used to know during childhood is now a frank tough delinquent, would her love for him bloom again? From Intercross: Sakura Ai has always loved sunflowers, as they appear like the sun, which incidentally also was the name of her first crush, Taiyou, in the 3rd grade. From since then, Ai has never had another love and has also become quite introverted, but after meeting a guy with the same name, somethings will begin to change… Also contains: Sugarless Kiss Ami met Kasshi-senpai when he took a bite out of her choco banana muffin. Since discovering that he likes sweets, she has given him various handmade sweets. But that doesn't stop him from having other girls around. Tsunde Renjyou Yuika and Haru have been dating for a year. Yuika is selfish and likes sweet things, while Haru is amazingly kind. But will Haru end up hating Yuika because of her attitude...

From Midnight Scans:

A quiet girl falls in love with a fourth year ikagu club member, Koushirou-san, who is a kind, serious, and charming person... But then... why would he...!?

They met. They kissed. They parted without a word. The next day, he turns up at dinner with her parents... And he's her father's stepbrother! Seven years her senior, and her uncle by marriage alone, he has been trusted with the duty of living with her as an "uncle" while her parents are working overseas for two years. Even though they're not blood-related, can Mao decide to love him and go through the struggles to be in love with him?

From Condensation:
Toujou Souko attends a Catholic high school for girls and spends most of her days ditching class and trying to hook up with guys. She's in a hurry to fall in love and often gets into trouble. Ueda-sensei is Souko's homeroom teacher and all the girls idolize him on campus. He thinks Souko's a good kid and is looking out for her best interests... Yet he never meant to encourage her to try and seduce him...
What begins as a passionate affair becomes a true and undying love... Ai Girl is an angsty love story loaded with melodrama. It should be noted that this series has adult themes and high smut content.