From Storm in Heaven:

Supika studies at a school that teaches the magics of astrology and astronomy. Astrologers like Supika can use three magic items, a sun, moon, or star. Supika uses the star Spica (Virgo's brightest star), which is the most powerful item she can use at her level. In the school, however, women are stuck as third class students--they aren't allowed to reach the higher levels boys can. Of course, Supika doesn?t really agree with the obsolete rule and tries to get more powerful in order to become first class. Amano, the son of the principal, doesn?t agree with Supika?s free spirit and tries to stop her from becoming a first class astrologer...

Also inclued a story called Kaede.

Introvert Umi Youko has just entered high school, and has been having trouble in making friends. There is one person though, whom she is very close to - Mikami-kun. But Youko slowly starts to feel that she's simply troubling Mikami-kun too much by always relying on him, so what happens when she tries to ask someone else to lunch instead...?

"There's no such thing as happily ever after. Because the two of us aren't a prince and a princess..."

Yi Sol is a boy born from a strange experiment conducted by a hospital... In his high school days sixteen years later, he is hunted by a mysterious organization. And as the days pass, Sol discovers that he has a strange power related to the mark on his forehead.

In South Korea, students who buys bread and run errands under the force of the school bullies are called the 'Bread Shuttles'. Young-soo Lee is living a miserable life as the bread shuttle of Iljin, and then a weird, logical but weird 'Messiah' named Gun Kim shows up in the school.

Yi Sol is a boy born from a strange experiment conducted by a hospital... In his high school days sixteen years later, he is hunted by a mysterious organization. And as the days pass, Sol discovers that he has a strange power related to the mark on his forehead.

Atae Souichirou, 15 years old, is an angry schoolboy who has a scary face. He has been raised by his granny because his parents passed away when he was a little baby. Souichirou's passion is drawing and being in an art club is what he always wishes for. However, other students keep on rejecting him because of his bad temper.

One day, he meets a male student named Ogiso Kaname - 17 years old, who agreed to become his muse. However, it turns out that this event is a smash that helps Souichirou realizes that he's genuinely interested in a male's body! After that, Souichirou started to have a fetish for his senpai Ogiso and promised that he will protect Ogiso from bad people who sexually abuse him by becoming senpai's lover.

From Shinmakoku Scanlations :

One time during his high school years, Hosho impulsively dry-humped Saotome, his soccer club senpai whom he admired. After the incident, they didn’t speak of it again and their relationship became strained. It’s been eight years since… Hosho is now a #1 host and has recently moved. However, the landlord living in the apartment next to his is none other than Saotome! Hosho is engulfed in complicated memories, but he is wary of Saotome’s unchanging kindness and the reasons behind his own impulsiveness eight years ago! This is the heart-jerkingly pure love story of Saotome, the too-cute-to-be-true landlord and Hosho, the host whose talents are wasted on him.

This is a fantasy epic of truly magnificent scale with gorgeous illustrations. In just two volumes, the author manages to create an incredibly rich and fascinating world that is full of wonders and enchanting beauties.
In this world, men are watched over by the mechanical goddess Marie who at times appears on the sky. Marie's music brings people happiness and harmony. Their life is free from advanced technology and the longing for progress.
The main story centers around Kai, a young man who develops a deep affection for Marie. His quest for enlightenment leads him inside Marie's mechanical body where he learns the unbelievable truth about her and his own world.

From kodanclub.com:
Soon after entering junior high school, Hinata Abe is hit by a truck, but survives with only minor scratches. This earns her the nickname of "the Miracle Girl" at school.

Hinata has a creepy dream the night after she leaves the hospital. She awakes to find her room filled with flames and smoke. When she cries for help, the Virgin Mary appears before her! Mary explains to Hinata what really happened to her: Hinata actually died in the accident 3 weeks ago!

A series of mistakes stopped her soul from going to heaven. Mary tells Hinata that she is dead and it cannot be changed. But Hinata pleads for her life back. Mary agrees to offer her a chance on one condition: Hinata must save 12 lost sheep within 100 days. She starts her mission to regain her life, wearing a pendant given to her by Mary.

A miraculous fantasy love story begins.

From DoujinToshokan:
Mare is a mysterious girl who has the power to summon monsters. Mare comes to a high school looking for individuals with relationships full of envy, hate, anger, and desire, searching for unjust acts and dishing out her own brand of justice. What is her purpose, and what challenges await her? And what awaits the students here with her arrival?

Alma is born a witch after her father makes a deal with the demon Mephisto. She seems to be able to travel through time and goes back to the middle ages in Europe, the Mayan / Aztecian time as well as the Roman ancient time and Nazi Germany.

1-2) Taken Care of You
Chiaki is the new coach for the soccer team. Aiba, a star player, is doubtful that anyone as small as Chiaki can teach him anything. Aiba already cuts practice and doesn't listen to anyone. Chiaki's work is cut off for him, but he really wants to teach Aiba. But teach what is always a question.

3) Leave My Angel Alone
Manabe Kensuke has been asked to take care of and protect his younger cousin, Kai, who is being stalked. As time goes on, the cousins are becoming good friends - very close. But is it too close? Is Kensuke any better than the stalker?

Vol.9 in Kemono Series

Kirishima Kaoru is the lover of Daigo Mikihisa. One day, Daigo's father, president of Mercury corporation, orders his illegitimate son to be married to build a political alliance. What would the emotionally fragile Kaoru do when he finds out? A story of two men fighting for their love in the business world!

From NOIR:
Memory eaters live on people's memories. They are originally death messengers who remove a human's memories when they carry souls. But some of them are charmed by the beauty of the memories and become Exiles: Memory Eaters. Dio is one of them, but instead of stealing human memories like other Exiles, he earns them by helping people. One day, Dio finds a girl who is losing too many memories from Exiles. He tries to help her, but Ces, who was a model death messenger, is around her. What is he doing here?

This award-winning classic story focuses on Marlee, an agent of the space empire sent on a mission to track down the opera singer Eroccus. There are three intertwining narratives which span planets and hurl the readers back 30,000 years in time. The narrative takes place in a non-linear fashion, unfolding across space and time, before folding back upon itself at its culmination.

Note: Winner of the Seiun Award in 1983.

Note 2: Gin no Sankaku was not serialized in a manga magazine. Based on content, it could be considered either seinen or josei.

N/A

Niu Qingqing is a regular 14-year old girl with a close cousin who is obsessed over Hanfu, or Han Chinese traditional clothing. Qingqing encounters a 'cute' mysterious young boy in early 17th century garb in her cousin's university campus one day, and decides to join the Hanfu club to find him...

After being in an accident, a high-school girl ends up with strange visions of horror, deaths, and murderers. She is not sure whether these are nightmares or premonitions, so she decide to find out the true meaning of the visions.

Oneshot from Sayuri Hime

Tsukasa and Akira are sent to get snacks for the rest of the student council.