Mato-chan is a 3rd grade elementary school girl that likes bugs sooo much. Take a look at Mato-chan and friends' daily life!

Mikio teases his neighbor Mariko a flat-chest and she calls him a midget. When one day Mikio turned miniature and ended up in Mariko's care, they discover how wrong they are about each other.

A collection of one-shots:

Vol 1:
Magician
Fairy Tale
Cocona
Plue's Adventures Pt. II

Vol 2:
Bad Boys Song
Magic Party
Christmas Hearts
Fighting Group Mixture

From Intercross:

Hatsune is a useless, devious girl. One day, Hatsune's father decides to make her live with a fastidious boy! Kaede-kun, being fed up with how unladylike Hatsune is, decides to become her tutor.

A sea prince wishes to have Christmas under the sea. Can his butler make his dream come true?

Tomo Fukuya loves taking pictures of himself while cross-dressing, and he's gained some notoriety among his schoolmates because of it. He participates in his school's beauty contest during the school festival against his friend Kei Okabe.

• Nante Zurui Otoko (What a Sly Guy)
Yoshino Nene is a 16-year-old girl who fell in love at first sight with Fukazu-san, a man 9 years older than her. She sends him emails, trespasses (?), and intensely hits on him, but he won't respond to her. Finally, he told her: "I won't ever fall in love". But he looked very sad when he said that. Nene wants to know his real intentions...
- Intercross

• Kimi ni Makasenasai!
After confessing to someone and being rejected, the infamous girly second year, Kaji-senpai who witnessed the whole thing offers to pick Tajima Rika up. And so begins Rika's transformation into a cute girl through Kaji-senpai's hands.

• Come to My Side
Uchino Tomaki, a 17 year old girl, becomes interested in her younger brother's friend, Shun.

• Kimi wo Itadaki!
About a girl who cannot stop feeling the need to compete with her childhood friend. Her uneasy feeling has made her never thought anything other than competing. Then a confession comes for her.

• Wolf Cherry
A girl bumps into a classmate and finds out his secret... He's a shoujo mangaka!

From Neptise Scans:

The story follows Shintaro, the Ganma Army's #1, after he gets stranded on the wacky Papuwa Island.

Nanami transfers to St. Marivel (Mary Bell) High School from America as she looks for her childhood friend, Kotaro. In a school where the ratio of male students to female students is 1:20 respectively, Nanami gets involved in a conflict with a male student who is almost twice her size. As Nanami was about to engage in battle, she catches a glimpse of Kotaro and stops, allowing the male student to grab hold of her! How will she get out of this situation?

Mahjong Oneshot included in the same volume as Death Pie, another longer mahjong manga by Shimamoto Kazuhiko.Related: http://mangapark.com/search?q=death-pie

From Anime New Network: Zushio was to be king and promised his sister that he would become king (on penalty of death). Unfortunately for him, his empire was overthrown and now he's a wanted man. A girl has the misfortune of running into Prince Zushio and becomes tangled in his plight. Adding to her misfortune, Zushio is not quite right in the head, but hey, at least he seems to be immortal.

From Sarang Syrup:

Shin Dong Sun is the new girl in school and the problem seems to be that she’s fat, short, and ugly. She is picked on by her fellow classmates, her childhood friend, Jeh Suh, constantly abuses her, and her only love rejects her! Tired of her intolerable life she attempts to hang herself, but fails when the rope snaps due to her massive weight and there she finds a box full of medicine, and one bottle says that it’ll turn her into however she wants to be…

Special chapter/epilogue is yet to be translated.

From Storm in Heaven:
A short gag manga featuring You Higuri herself. It revolves around her utterly cute, mischievous, and ill-mannered puppy Papi, the Papillon.

17 year old exemplary student Bae Sugu lives alone with his father, the vice principal of his school. Weighed down by his father's expectations, Sugu has to hide his one true passion: swimsuits. He does not know where it comes from, but his passion is pure and genuine - and often misunderstood. But one day, when Sugu is secretly taking pictures of swimsuits by the pool, he is caught by his homeroom teacher who forces him into something ridiculous. Can Sugu find something to get out of the standstill his life has come to? Can his heart beat again? Webtoon from Naver

During a flashback, an interviewer inquires Kuzumi Taiga, a prospective student for Seinagi Private High School, on what he would do if he could use magic, during his entrance interview. He replies, "take over the world", with an outburst of laughter, from an attractive girl, following his answer.
After the entrance exam, the school rejects his application; although he recalls almost nothing after this event, he does recall the girl, and believes the cause of his school of choice rejecting his application involves her.
Wandering around outside of the school the next day, Kuzumi tries to enter, but an invisible barrier blocks him. A teacher, Mr. Hiiragi, confuses Kuzumi for a student of the school ditching class and pulls Kuzumi into the school through the barrier.
Seinagi Private High School is actually a magic school and Mr. Hiiragi has just accidentally pulled Kuzumi, a teenager with no magical skill, through the barrier into this school.

Crimes committed by "Kaijin," superhumans produced by technology, are on the rise in Tokyo. Shibasaki Ken and Momoyama Reiji are assigned to work together to solve a recent serial killer case. In some ways they complement each other nicely: Shibasaki is an expert tracker, and Reiji is an expert at combat. Their personalities, however, do not mesh at all. Shibasaki would rather skip work to flirt with girls, while Reiji is violently overzealous about his job. Will they be able to work together to solve the crime before more lives are claimed?

Human Experiments have taken place and a group of people have fled the facility experimenting and has formed a family. The boss, a young lady, has a power, a power she hopes to cure everyone with.

Katagiri Aoi lives in the countryside, and likes it just fine there. Yet, to her dismay, her parents are moving to Tokyo, and she has to come along. Just before leaving her home town, however, she has a chance encounter with a visiting Tokyoite, Sugita Tsuyoshi, a city-born playboy type. On impulse, he kisses her--only to realize that this kiss, unlike all the others, carries unexpected meaning for them both.

Extra stories:
vol1: Love
vol1: The River Person
vol3: Psycho Love
vol4: Wait For a Night When Snow Falls
vol4: Your and My Rendezvous (Rendebu)
vol4: A Tearful Tale of Love

From MegKF:
This manhwa is a parody of a Korean novel called Sarangbang (Korean room) Guest and My Mother, a story that most Koreans have read. It's a classic piece about a widow and her child. The widow rents a room in her house to a man, but soon after, the man and the widow have feelings for each other. The key thing here is that the story is told through the eyes of the six year-old child.
In this parody, the widow is a "game-junkie" who runs a game room. One day a very handsome man collapses in the game room.

From Girls' Generation Scanlations:

1-3) Love at Full Speed
Keichi and Sora live a happy life now that they've moved in together. Keichi work as a director at a design office and Sora works as a hostess in a bar while attending university. The odd thing about all that is they're both men, and there's a third person coming in between them. Can Sora and Keichi struggle to live their happy lives in peace, or will the third person win...?

4) Trip to the Hot Springs
Keichi and Sora take a trip to the hot springs.

5) Let's Go, Love Birds!
Kai is a Librarian who is trying to get used to the fact that his lover Iwanuma is raising his deceased sister's 2 young children.