From September Scanlations:

Oda and Hasegawa are childhood friends bound by a very special secret: Oda’s a third-generation pig farmer on a farm that raises FLYING PIGS. But when a nosy reporter starts investigating tales of upward-mobile porkers in the area, the two must band together (and thereby grow closer in doing so) to protect Oda’s family’s livelihood as well as the good-luck-giving swine.

From Kiwimyweewee:

A college student named Mitsuko works at his uncle’s hostel. On his way from an errand, he finds an unconscious yokai, Tenshi. When Tenshi wakes up he acts ferocious and arrogant. To express his gratitude to Mitsuko for saving his life, he also becomes a guest at the hostel on his own accord until Mitsuko decides what he wants. After being acquainted with Tenshi, gradually he opens his heart to Mitsuko. Suddenly Tenshi’s body transforms into an adult-like appearance and harasses Mitsuko!

In the gritty backstreets of Paris, Jin ekes out a living as an informant while his buddy, Mari, does business as a hitman. They've been friends since they were brats, but Jin's demanding behavior has Mari growing increasingly resentful. Even so, Mari can't seem to cut his ties to Jin.
Has their friendship lasted so long it's become impossible to break? What will happen when Jin's new live-in boyfriend ignores Mari's warning about Jin's carefree lifestyle…?
(ch.4 about guys from Non Tea Room)

From JShoujo Scans: Hana is a 16-year-old girl who's a bit of a tomboy. She gets dumped by her boyfriend when she moves to Sapporo after her parent's divorce. On her first night there, she comes across a young guy who is seemingly too ill to walk. He ends up collapsing on her and is quickly rushed to the hospital. As it turns out, he's her next door neighbor, Shindou Hiroto. The next day, when she goes to her new school for the first time, she finds out that he's actually a teacher and that he's the teacher of her class! With his out-going personality and friendly demeanor, he gets along with everyone, but she notices there's something a little different going on between him and Nishiwaki, a classmate of hers whom the others write off as a "cold-hearted beauty." Hana always runs into him on her way to school, and as she gets to know him more, she finds herself falling for him! Things get even more messy when her boyfriend who broke up with her comes to Sapporo saying that he wants to give their relationship another shot!

From ShoujoMagic:
The two high school girls, Hanazono Mito and Tatsuda Seshiru, have been friends since kindergarten. But while Seshiru is an honour role student, Mito is constantly breaking school rules.

One day, Mito helps Seshiru evade the advances of the arrogant Ran, a rich boy and model who mistakes Mito's interference for jealousy (because of course every woman wants Ran for herself! Yeah, right). This lands Mito in hot water with Ran's fangirls, who later gang up to kick her ass! A new transfer student with wild hair is the one who saves her, but he won't tell Mito his name...!?

Fuguno Masuo is a hapless 24 year-old businessman who is unlucky in love, He's never even had a girlfriend! After consulting a fortune teller, Masuo believes he'll never have a chance in love. All that changes when he meets the beautiful Nagisa Shiozaki at a marriage interview pub, who herself has had the same poor luck with guys. Now he'll do anything to woo the girl, but he'll have to fend off other suitors and the affections of a co-worker, all while keeping himself out of awkward situations that always end badly for him. Originally penned by YAMAHANA Noriyuki under the pen name HANAKO.

Two students sit together and start talking about stiff shoulders, massages... and various other things their active teenage minds come up with.

From Girls' Generation Scanlations:

1-2) Ouji no Kikan
Satake Kou attended the wedding of his sister where he was reunited with his cousin, Fumihiro, who used to be a very dumb fat guy, then transformed into a charismatic prince! Kou became undeniably self-conscious about this while not being aware of Fumihiro's high regards towards him since they were little. Fumihiro's admiration has turned into something complex. How would Kou respond to Fumihiro's feelings?

3-6) Metamorphosis
Adachi has been friends with Ritsu since they were children. Suddenly, Ritsu starts changing and acting like Adachi has never seen him act before... and the reason for that change seems to be Ritsu's new senpai, a troublesome guy. Adachi slowly realizes that he feels more than just friendship towards Ritsu... but it's too late.

7-9) By His Side

10) Ouji no Kikan Extra

A one-shot collab between Hatta Ayuko (Ookami Shoujo to Kuro Ouji) and Mizuno Minami (Nijiro Days). Sata Kyouya is the school’s guidance counselor and he has to deal with an odd group of students.

A continuation of the story from "Escape from High-school Girls."

The schoolgirl zombies discuss their daily lives.

Released at C82.

Fuwa Rito is an otaku wasting his time in a gal game appreciation circle. Ruri is a childhood friend who has a crush on him and is worried about his otaku ways. Trying to find out who he likes, she setups a group dating between her friends and the guys of this circle in a Maid Cafe. What she doesn't know is that certain big chested maid is about to enter the game!

From Chibi Manga:

Kaji, Yuzuha's unrequited love, is a good friend of her twin brother Suguru. He's the same age but goes to a different school and since elementary school, he's been going in and out of Yuzuha's home. She's been in love with him all this time, but can't make a serious face when around Kaji. Now they both change to the same high school and there's the chance to decrease the distance between Kaji and her...?!

This collection, titled simply Short Program, collected stories by Adachi published between 1985 and now.

Volume 1 (from Shougakukan):
1. Kinkyou "Recent Times" [1987]
2. Kousaten mae (Before the junction) "The Intersection" [1986]
3. Shooto Puroguramu "Short Program" [1987]
4. Teiku ofu (Take off) [1988]
5. Chenji (Change) [1985]
6. Purasu 1 (Plus one) [1986]
7. Murasaki (1985)
8. Nani ga nandaka (What is what?) Part 1 [1985]
9. Nani ga nandaka (What is what?) Part 2

Volume 1 (from Viz)
Story 1 - Change
Story 2 - Take Off
Story 3 - Short Program
Story 4 - What's Going On!? (Part 1)
Story 5 - What's Going On!? (Part 2)
Story 6 - At the Intersection
Story 7 - The Current State of Affairs
Story 8 - Plus 1
Story 9 - Purple

Volume 2:
Story 1 - Before Spring Comes
Petit Comic April 1992
Story 2 - Subject - Wakaba
Weekly Young Sunday January 1995
Story 3 - A Stop on the Way
Shōnen Sunday September 1994
Story 4 - 5X4P
Big Comic Superior July 1992 - September 1992
Story 5 - 4 on the Richter Scale
Shōnen Sunday July 1988
Story 6 - Aim At the Ace
Shōgaku Shinen Sei June 1986
Story 7 - Spring Call
Shōnen Sunday April 1993
Story 8 - Spring Passes
Big Comic Spirits May 1993
Story 9 - The Road Home
Young Sunday October 1989 - November 1989
Story 10 - Sayonara Game
Big Comic 1991 Summer Special

Volume 3:
Story 1 - Clogs and Diamond
Story 2 - Where the Wind Blows
Story 3 - Angel's Hammer
Story 4 - Memory Off (part1)
Story 5 - Memory Off (part2)
Story 6 - White Summer / Shiroi Natsu
Story 7 - Square Ocean
Story 8 - Idol A (part 1)
Story 9 - Idol A (part 2)
Story 10 - Idol A (part 3)
Story 11 - Running God
Story 12 - Short Mail

Volume 4: Girl's type
1. Short story of a parasite (part 1)
2. Short story of a parasite (part 2)
3. Harsh life of a parasite
4. Love confession
5. Season
6. Two champions
7. Capricious Punch / Kimagure Punch

From The Zero Alliance:

In the midst of a battle against heroes, the demon king, Rou is transported to a different world, where he ends up as a high school transfer student. When his classmate, Hitose discovers his true identity, she tells Rou that she wants to help him get back home. Although Rou thinks of Hitose as annoying and strange at first, they manage to form a friendship.

Note: Original language image is unavailable without a watermark.

Two high school girls are complete enemies, and they both are in their own gangs. They fight each other all the time, and to get even with the other, one girl tries to kidnap the other's boyfriend. But the information her right-hand girl gives her is wrong, and they kidnap some really good-looking guy who is NOT the boyfriend of the other girl. You know what happens. They fall in love.

Side story: Photogenic
Photogenic centers around the girl in question, who has gone to cram school every day of her school life, finds a photo of an amazingly cute guy, and imagines what it would be like to be his girlfriend, instead of being one of the smartest girls in Korea.

Compilation of short stories:

1) Samurai Darling
Amiko saw a boy dressed like a samurai at a school festival. What will she do?

2) Toumei Shoujo (Lucid Girl)
Yuki rejects a present from his childhood friend Risa, but something happens and he sees things from a different point of view.

3) Some Kind of Childhood
Rika doesn't understand the point of kissing. Will she change her mind?

A slightly strange story about a puppet and a young girl.

From Nagareboshi Manga:
Aria’s parents have been gone since she was very young. Thus, she’s had to grow up in a “foster home” of sorts, and was raised by nuns. On her 16th birthday, Aria recieves a present in the mail– a ring from her “Daddy-long-legs” (a man who protects someone from afar while they’re growing up)! All of a sudden Aria’s life is thrown into chaos. Men try to run her over with cars, shoot her, and kidnap her. Relief comes in the form of Canon, who claims he’s her bodyguard. But can he keep Aria safe forever?

A story set in the near future, about a middle-aged loser whose only refuge is a virtual bishoujo game.
Takuro, the main character, is a stereotyped, low self esteem, adult male in a dead end job. Because he feels he has nothing to live for, he let himself go, becoming fat, miserable, and lonely. The only shining thing he lives for is the occasional visit to a brothel where his savings will allow him to at least not be completely sexless. This is when, through a real life friend of his, he is introduced to the virtual reality world of "The Unreal". Where, after spending $6000+ on equipment, you can purchase a virtual girlfriend who only thinks of you. Only the girl, Tsukiko, that Takuro purchases, seems to have come with a few defects.

One shot by the new Mangaka released in the 11th issue of Comic Alive 2013.