The story of the four panel manga begins when the world is invaded by game developer Nihon Falcom's RPG characters, including characters from Ys, Sorcerian, Eiyū Densetsu Shikkusu Sora no Kiseki (The Legend of Heroes: Trails in The Sky). The characters come together in a crazy academy life in celebration of the game maker's 30th anniversary.
from ANN

Paraphrased from Impossibility:

Kiriko has always been overshadowed by her older sister Eiko. Eiko is cute, smart, and extremely popular, unlike Kiriko. This manga is about Kiriko leaving her sister's shadow.

Ongoing Touhou manga from nva222 published in the official Strange Creators of Outer World magazine.

Ebisawa Ginpei is considered a delinquent. But that's not his true nature. (Maybe.)

As he continues his (misguided) quest to learn about himself, he meets his classmate Chigusa Somei (a monster with a desire for 120% approval) and discovers the dangerous depths of philosophy!

The wheels of adolescence are now set in motion for two people with mutual interests...!

Eriko Ichimura spends her high school days in complete obscurity. Her sole hobby is staring at handsome, smooth-spoken Akira "Omi-kun" Ohmi, and tweeting her daily fantasies under the screenname "Lovesick Ellie." One fateful day, she accidentally bears witness to Omi-kun's true self — and if that weren't enough, he sees her mortifying Twitter, too! Follow along with a plain, perverted girl, a two-faced boy, and their curious romance! [Kodansha]

This is the story of a medicine peddler, his young son, and their life on the road after losing their beloved wife and mother. A father who never managed to grow close to his child as he was often out doing his trade soon finds himself learning many things about life, love and family.

A young man who has just entered the university got an accident that causes him to be hospitalised for quite some time. That made him unable to find any friend, because those people have already created their own little groups! He was almost fated to be lonely, but luckily he met someone he really likes behind his apartment wall.

Meet Sasaki Sachiko. A 29 year old woman who works as an editor to a popular magazine. Her life is great, and soon it's going to be amazing because she's going to be married. Until suddenly .........
"Anyway, I need to eat so I could forget that day"

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Published in Indonesia by Level Comics under title "A Meal Makes Her Forget"

Chizuru is your typical shrine maiden high schooler living in a shinto shrine. One day, her friend, Aki asked her to do an exorcism for her but since Chizuru couldn't do it, they decided to ask the help of their attractive senior, Asakura, who's said to be able to do exorcisms. However, Asakura has an unbelievable fetish! In addition, Asakura's classmate, Suyazaki, is just as much of a weirdo as he is! What shall Chizuru do as her fate gets entangled with such a ridiculous group of people?!

In the latter half of the Edo period...
In a narrow tenement in the humid heat of midsummer, two men exchange heated sighs as they have intercourse.
A former kagema, a male prostitute, Momoki, was picked up by Manji one rainy day.
The times that Manji spends treating Momoki not as a kagema, but gently, lovingly, holding him as a lover, are much like a dream.
To Momoki, those days are filled with happiness, no matter what may have happened in the past.

A heroic sturdy male general, woke up to become a weak woman. The emperor however wanted this to happen, but also he wanted her to be on the battlefield, defending the homeland. However, she is no longer strong, how can she be able to fight?

A compilation of supernatural-themed short stories.

Shuri Komori is a 14-year-old girl, who is so nice that she can not turn down people’s request. She gains amazing abilities while she fulfills people’s request. There are many fun & happy things in her life, since she is an adolescent middle school student after all!

A manga overflowing with the ups and downs of everyday life!

Sixteen-year-old Yanagisawa Yae is our very optimistic heroine. Even when she was given only two options to pick from—either to move overseas with her parents due to their jobs or to move to the countryside to stay closer to her grandparents, she chose the latter. As she looked up the apartment she would be moving into, she ended up in a shrine. Since she is in the shrine anyways, she offers her prayer and tries out the fortune-notes. Incredibly, she picks up a "very good-luck" fortune-note yet it has only bad lucks written on it. The next day, despite of all her optimism, Yae finds herself struggling as misfortunes befall her one after another…

It is 1943 in Soviet Russia during the war. Nadya, an officer, and Vasenka, a witch, are looking for their allies. All they can do is walk until they find them. In the mean time, they get into silly little adventures and experience some weird stuff.

A fledgling magician attempts to summon a demonic familiar. What he gets is a sultry, slutty, poncy imp.

1) Travelling Companion to Hell

2) Sweet Unholy

3) Glory of Corruption

4) Love and Hypnotism

5) My Alice

6) Love From the Bath House

7) I Was Made For

8) Equinoctial Week's Lover

9) To The Endearing You

Mai Shintani, who works at the Kitakabane Police Station was suddenly assigned in the "Organized Crime
Countermeasures Division", commonly known as the "Sotai". Immediately after that, she gained influence within
her jurisdiction. The leader of expanding yakuza faction "Tatsygamigumi" Shogo Mikuro mysteriously disappeared.
There's a tension in the conflict between cases of opposing Yakuza groups. And for some reason, Shintani is looking
composed at the northern police station. Behind it is an absurd shocking truth?!

Tsuji-kun, what kind of girls do you like?

About a tanuki girl in Osaka who wants to be human.

This series follows the adventures of two main characters as one of the characters goes through a series of episodes in discovering his female identity as a trap. This is a series in which each adventure is a self encapsulated oneshot not dependent on previous oneshots for a coherent understanding of a story to occur.