In the Abe Seimei Koikatari series

V.1 - Hana no Utage

1. Feast of the Flowers
Ming became blind after an unknown illness two years ago. One night, she meets a man in her dreams who restores her sight. She falls in love with him, but how will she find him again?

2. The Girl Among the Moonlilies
A princess chases a firefly which leads her to a man. She is so surprised by him that she steps backward and accidentally falls over a cliff, losing her memory. What will happen to her?

3. Moon's Dew; Star's Tears

4. Winter's Bloom

V.2 - Hanakanmuri no Hime (The Flower Crown Princess)

1. The Golden Phoenix, the Silver Phoenix
A princess longs for a lost love and almost loses her life until a mysterious exorcist opens her heart and mind to the truth and to what has been right in front of her all along.

2. The Hime with the Flower Crown
A young princess learns with the help of a mysterious young boy that putting away childish things may ultimately lead to a fulfilling new world and to the fulfilment of her beloved father's wish.

3. Memories of a Flower
While trying to solve the mystery behind the ghostly apparition of his beloved princess, a young man learns to ease his own sadness.

V.3 - Hanaemi no Otome

1. Hanaemi no Otome
A daughter of a high status man is being cursed by Douman, a man with strong spiritual power. Abe Seimei is set to save her.

2. Kaze no Hatsune
Story of young Douman's love, and also of how he met Seimei for the first time.

3. Tsukimiya no Maihime

V.4 - Hana Akari no Yakusoku

From MangaHelpers:

Meldina hates humans, and wants nothing to do with them. Since her parents' deaths, she has desired to live surrounded by machines, and everyone in town thinks she's a weirdo. One day, she meets a big machine that she names Machina and treats it as a friend. Her meeting Machina, as well as meeting a potential friend in a girl named Alisa, kicks off a series of events that bring to light dangerous secrets about herself and about her parents' deaths. [tethysdust]

A three-man team of Martian-based Coordinators led by Agnes Brahe commands the Acidalium. The trio gets involved in the second EA-ZAFT War as Agnes controls the Voiture Lumiere-based mobile suit known as the GSF-YAM01 Δ Astray.

In the world, there are some evil creatures known as "chousha" (the kanji read "Chou" = "Omen" and "Sha" = "person") that can only be killed by Cremators, people who use fire to incinerate them.

Asahi, who goes to a male soap land to collect on their debt, coincidentally meets Kanna. The owner of the shop had run off, leaving Kanna,who was working as a live-in worker, suddenly without a job and a place to stay. Unable to abandon his former classmate, Asahi lets Kanna stay at his rundown apartment as a freeloader, however... 

Wada's debut oneshot, about a mansion with a terrifying secret.

Originally published in the April 2015 issue of Comic Spica, this is the first in a series of astrology-themed one-shots created by different mangaka and collected in an anthology

A oneshot from Aoharu 0.5 (2011).

Strange murders are happening in Tokyo. Due to liquid evidence at the scene, the police conclude the attacks are the acts of man-eating monsters, ghouls.
College buddies Kaneki and Hide come up with the idea that ghouls are imitating humans so that's why they haven't ever seen one. Little did they know that their theory may very well be reality.

Note: The prototype chapter won the Young Jump 113th Grand Prix award in 2010.

Kanae dropped out of high school, because her father is a gambler while her mother ran away with her boyfriend. Kanae is twenty-two years old, and very poor working for a cleaning shop. She comes to have something to do with Haruki Oda quite by chance. Haruki is an IT millionaire and called "money-mad man," or "the god of death." Then Kanae's life makes a sudden development. Money cannot be made by love alone, though love cannot be bought with money. People of today want to have both love and money. This get-happy-story is a must read for the present-day people.

From VIZ:

Winning isn't everything in the game of basketball, but who wants to come in second? It takes dedication and discipline to be the best, and the Shohoku High hoops team wants to be just that. They have one last year to make their captain's dream of reaching the finals come true--will they do it? Takehiko Inoue's legendary beloved basketball manga is finally here and the tale of a lifetime is in your hands.

Hanamichi Sakuragi's got no game with girls—none at all! It doesn't help that he's known for throwing down at a moment's notice and always coming out on top. A hopeless bruiser, he's been rejected by 50 girls in a row! All that changes when he meets the girl of his dreams, Haruko, and she's actually not afraid of him! When she introduces him to the game of basketball, his life is changed forever...

Notes:
- Includes a oneshot called 10 Days After.

- In 1995 Slam Dunk received the 40th Shogakukan Manga Award for shounen.

This is a story by the author of Kero Kero Chime, and you can tell. The characters look similar, though the plot seems different.

Rupika lives on a far off planet called Rakariina and has a growth on her head that looks like a tiara (called the Twinkle Tiara). Her grandfather tells her that her destiny begins when she meets a man with the Twinkle Crown. Every so often on this planet, a lot of meteors fall and a lot of new aliens land on the planet. Rupika goes out to see this and maybe find 'her prince' (the Twinkle Crown) and is captured by a boy named Alpha, who then mentions something about someone named Rozeus. Rupika wants to see Rozeus and leaves Alpha's spaceship, which is actually a big turtle. The new aliens seem to know something about her tiara and start harassing her, and though Alpha tries to control them he gets knocked out. Rupika's situation turns desperate but suddenly a man with the Twinkle Crown appears.

Contains an unrelated side story called Taiyou ga Ippai! (A Drink of Sunlight) in vol.1.

Yi Raeeum, a boy who is always conscious in dreams. A spectacle in a dream... a street in a dream... a life and death drama where the secrets of dreams and a fate following a young time intertwine.

If you have a desire,
I will help you satisfy them.

Whatever it is.

Mimoza's grandfather was worried about her until the time of his death. Before he dies he tells her that since she was too vulnerable and easily lied to by everyone to never trust people. He also leaves behind Kyle, a robot, to protect her from others. Thanks to Kyle, Mimoza no longer feels alone. But will she ever discover the secret this robot hides?

Seikyou Private Academy, built on the intrigue of traditional occult myths, bears a dark past—for 60 years, it has been haunted by a ghost known as Yuuko, a young woman who mysteriously died in the basement of the old school building. With no memory of her life or death, Yuuko discreetly founds and heads the Paranormal Investigations Club in search of answers.

After a chance meeting leads Yuuko to cling to diligent freshman Teiichi Niiya, who can see the quirky ghost, they quickly grow close, and he decides to help her. Along with Kirie Kanoe, Yuuko's relative, and the oblivious second year Momoe Okonogi, they delve deep into the infamous Seven Mysteries of the storied school.

From The Pink Panzer:

In the year 2999, only eleven cities still survive on Earth. The climate has changed drastically, and a biochemical apocalypse has made women extinct. For centuries, the male population of Earth has survived by depending on only one woman, called the Holy Mother, whose ova are harvested to create genetically engineered children. By now, any concept of a world in which women exist as ordinary people is long gone. Society has re-structured itself around all-male families, and relationships between men and adolescent boys have become the norm.

At the beginning of Marginal, the Holy Mother is assassinated by a terrorist known as Grinja. The government in power doesn't want to start a mass panic, so it pretends that the Holy Mother has only shed her vessel, and that she will be miraculously "reborn" in the near future. The public, which is superstitious and devout, believes this easily. Only government officials know that behind the scenes, there is a frantic effort to create a being able to give birth.

The manga's story revolves around Kira, who becomes involved in a three-way relationship with Grinja, the aforementioned terrorist, and Ashijin, a young man who calls himself Kira's owner. A complex plot and flawless world-building make the story irresistible, and Kira's search for freedom is as symbolic as it is gripping.

One day, a young man is found unconscious outside the shared-household where Ayato lives. Despite the warnings of one of his housemates, Ayato lets the person live with them temporarily. It turns out that the young man is Ryou, who used to be Ayato’s childhood friend back when he was two years old. Both of them had previously been separated since eleven years ago, but are now reunited.

Ayato, filled with happiness as he reminisces about their early memories, is gradually drawn to Ryou. However, Ryou appears to be glum with melancholy, as if he's hiding something important…?!

We present to you a fresh new story of innocent affection! A Secret Love Story set under the same roof!

[Canis Major Scanlations]

The war between the two clans intensifies. Most of the Genji (Minamoto Clan) have fallen, and were taken as captives. Among them was the young Yoritomo, a surviving successor of the Minamoto Clan. Yoritomo was pardoned by the head of the Taira Clan and was exiled to Hirugakojima, a small island in the Izu province. Yoritomo lived a peaceful and contented life in exile and never once thought of taking revenge.

One day, a monk was sent to the same island, supposedly banished for insolence towards the Emperor. Incidentally, this ill-mannered monk called Mongaku is Yoritomo's acquaintance. Mongaku meets Yoritomo and tries to convince him that the time has come to take revenge on the Taira. However, Yoritomo shuns Mongaku’s words….