From Chibi Manga:

1. Hajimete (w)o Anata to
I tried to open the box that kept my love!
Sayo started to go out with Sakai-kun. She was so happy to go out with the guy she "truly loved". But they couldn't do normal thing that couple are doing like going together to school, send messages to each other everyday, have some date etc... why is it like that?!

2. Saigo no Yoru ni

3. Kareshi ni Tsuite no Nayamigoto

4. Angel Sky
Miki and Izumi have always been together ever since they were kids, and Miki believed that they would always be. That is, until a small boy appeared next to Izumi that only Miki can see. It is then that the small boy tells Miki that he is an angel, and soon he is to "take" Izumi-kun...

Four cute school romance stories, all having some sort of time theme. In the first story, a girl discovers she can freeze time. In story 2, a girl discovers she can communicate with a boy living 6 years in the past through notes written on her desk. In Story 3, a girl finds herself living the same day over and over again (like the movie Groundhog Day) and finally, a girl who has a crush on a boy 3 years her junior discovers what the world would be like if he were the one who was 3 years older instead.

This school is known for its football club Ranzan, a refuge from the head of the largest departments. To avoid disbanding the club, the manager using the new football coach: Tetsuo Kuroki. He will choose to form teams with the strongest students. And indeed, four of them come to integrate the school. Among them Shingo Narita, a student is turbulent but not a bad person who does not hesitate to fight to defend his colleagues. When he proposed to join the club soccer, a sport he practiced a few years ago, his enthusiasm took over. Through sport, Professor Kuroki will teach them that there are other solutions that come from a single blow.

From ShoujoMagic:

"Forgive me. I can't become a servant of the Lord yet," Maria says as she runs from her vows ceremony at the convent where she was orphaned 16 years ago. She has received another letter from the mysterious "G," her faceless benefactor. She is not as alone in the world as she thinks; "G" writes that she has a relative at Hakuhou Academy who is in need of her guidance, but he cannot tell her this relative's name. Trying to enroll and search the school presents Maria with a number of problems, however -- the foremost of which is: Hakuhou is an all boys school!

A simple, but touching story about the afterlife. Before heading to the path of heaven or hell, a human soul enters an afterworld bar that is situated between the split paths. Follow what happens to him as he steps inside the bar.

From ADV:

A mysterious creature has fallen from the sky and landed right at young Yuina's feet! Branded as the master of this new angelic being, Yuina is forced into an otherworldly pact, one that will take her beyond the clouds and into battle against a new and yet hauntingly familiar evil, one that patiently waits in the shadows.

Set within a ravaged world, a girl protects the people from these monsters is interwoven into this mysterious fantasy.

This is a oneshot from the Moonsorrow Collection II.

"Originial" doujinshi by the circle Moonsorrow.

A story of a young man who just adores his little sister... Maybe a little too much.

An oneshot from U12 Kodomo Fellows comic anthology.

From Tokyopop:
In the future, the most popular game in the world is Angelic Layer. Contestants must raise and train their own 'Angels' (or fighting dolls) to compete in tournaments. Enter Misaki Suzuhara, sixth grade Angelic Layer prodigy. With her speed-type angel, Hikaru, many people think Misaki stands a chance at winning the championship. She'll have a lot of help along the way, but the road to victory will be not be an easy route, especially for someone as young as Misaki.

On her 12th birthday, Angele is infected with the strange and fatal disease that causes feathers to sprout from the body. She is sent to a solitary institution to be quarantined where she meets a man named Hakana and the wheels of fate begin to turn. (Source: Mangaupdates)
Based on the free game from Niconico.
Play the game in Japanese: https://game.nicovideo.jp/atsumaru/games/gm4581
Watch a playthrough with everything narrated: https://www.youtube.com/watch?v=wFmcgB3bikM

The lonely and isolated girl named Inori was sent to her grandmathor's villa in overseas for recuperation. There was not one day that she wasn't bored staying in a big house with no one she could talk to until the day she met Haruka, who lightened her world.

From Manga Art:

The Cosmos is ruled by a holy queen who guides and watches over the movement of the stars. By balancing elemental forces with the help of nine Guardians, she keeps the planets stable and the people content...However, the power of the queen is fading and a new queen must be appointed.

Two girls are selected to be the queen candidates: Rosalia de Catargena who comes from a noble family in one of the main domains and the main character, Angelique Limoges, a seemingly ordinary girl.

Will Angelique become the holy queen? Or will she fall in love with one of the many handsome Guardians and forfeit her candidacy?

Follow Sudi, the traveling performer and Blackie, the talking cat through time as they try and find the mythic Angel Tear and make some cash along the way. A three arc story about angels, love, betrayal and beautiful men!

"Angels' Wings" is a short, all-color manga in which two friends play make-believe. (from Lililicious)

In the 13th century, the Mongolian Empire rapidly expands across the globe. Later historians who studied the prophecies of Nostradamus would say that Mongolia was the birthplace of the "Great King of Terror," Angolmois. And at last, the force of the Mongolian Empire would turn their attention toward Japan... 1274: The Bun'ei Invasion. The exiled samurai Jinzaburo Kuchii is in Kamakura when he finds himself face to face with this invasion.

This story is a fresh look at the great battle that rocked all of medieval Japan: the Mongol Invasion. It shows how the people of Tsushima panicked, struggled, and eventually rose up against the overwhelming forces of their enemy.

The main character gets visited by the angel Micheal, in female form. She tells him that the Earth only has 7 days left, and it’s all up to him whether Earth will survive or not. But this guy is huge pervert, and the angel just wants the world to be destroyed. Follow their adventure to see if she gets she wants by letting the guy do whatever sins he pleases.

"In a Fight, they say that the first one to bleed from his or her nose is the loser. Father, Mother and Brother...They're all LOSERS that bled from the nose facing that damn monster called WORLD!

I'm not going to fall into that one. Even though I have to break my head, I'm not going to bow my head before anyone. I'm going to finish everyone! I'm going to throw everyone on the ground with the "Ushi Mata".
Even though my opponent is...a GIRL"

The Boy that doesn't bow his head to anyone...
SUK DONGMIN

Liam is a high schooler, who steals anything he can, and resells them on cr*gslist.
But that’s when he bumps into the trio…

From Yen Press:

When sweet and docile Hikaru swaps bodies with her beloved twin brother, Youta, her personality does a complete one-eighty--and she starts taking brotherly affection to a whole new level! Will Youta ever get his body back in this cracking forbidden love comedy?!

When his father re-married, Kazuichi was a timid boy who was easily bullied by his younger stepsister Yami. Through hard work, Kazuichi has become a handsome young man who's the president of the Archery Club and admired by everyone. All in an effort to impress Yami as a reliable older brother, or as something more?