To fight the increasing number of worldwide terrorist groups and psychopaths, the confederation proposed to have 242 countries hold hands and establishing an organization of geniuses, with at least a score of 180 IQ, with unique skills.

This is "SI", also known as the "Special crime Investigation".

Kana just broke up with her boyfriend, when her older sister Mizuho calls her to ask for her hospitality for her and... her girlfriend. How will Kana, who hadn't ever imagined her sister to be a lesbian, cope with this cohabitation?

From JShoujo Scans:

Kazuki Miyaichi is a girl who feels that she does not receive any love from her mother. As she carries anxiety about not being needed by anyone, she begins to feel attracted to a juvenile delinquent named Hiroshi Haruyama.

From Chibi Manga: Please, teach me about things we can't do ! #1. Ijiwaru na oni Kyoushi...a pretentious and cruel teacher give her private lessons after school?! #2. Geki Kawa Kyoushi…a morose girl with glasses and a handsome teacher = don't tell me it'll have some alchemy between those two?! #3. Kiken na Hokeni …A kind and gentleman teacher is in fact not what he seems to be...!! #4. Onna Kyoushi no Ikenai Koi…Though she's dreaming about an adult and handsome man, she'll become close to a high school boy...?!

Saving up for an extravagant dessert treat is not a sin, well, neither is getting into an argument with some EXTREMELY RICH GUY just because he snatched your long awaited dessert a sin either... However, things are about to go into a spiralling twist of events when that guy popped up the next day saying " Become my woman! "

The Scissor Sisters are a family of hair-dressers who work for a secret organization devoted to protecting the Earth's inhabitants from the Datsuumo, aliens that feed on human hair.

From Girls' Generation Scanlations:

Since the prequel, Yurina has set aside her painful memories of being bullied by Takaya, and accepted his sincerity. They're now dating and slowly rediscovering themselves, but their kindergarten classmate Nogi dredges up their past and vows to "rescue" Yurina from Takaya's evil clutches. Will Takaya and Yurina's love - a love that started off on a bad footing - withstand new trials, growing uncertainty and revisits to the past?

Set in the Daiouyama Prefecture High School, a school with over 3000 students. The Student Council Empress decides that small clubs are a blight on the schools resources, and that they should be forcibly merged into one club. Which of course throws four very different clubs and girls with different interests into the same room…

Sex and an insider perspective in exchange for a place to stay. That's the deal young prostitute Bun strikes with jaded detective Daisuke. But how long can their relationship last when they’re both insisting that it's Not/Love? Miyamoto Kano's "Walker" universe timeline: 1) Are You Enemy? 2) Not Love *licensed -- Not/Love dj - The reason why we live together -- Not/Love dj - Dog Days -- Not/Love dj - Demonic Conversations 3) Heat (MIYAMOTO Kano) 4) Under the Skin the ones on ( -- ) are doujinshis..they give background or "add into" to some key points in the main story line. So you're not really missing anything even if you don't read it.

From Evil Flowers:
The story shows how Caien became a demon lord, is about his relationship with Rakin, The King of Speira, and the love triangle between the 2 with the beautiful Rea of the mascan race. Asarella also apears, but the story seems to be concentrating more on Rakin and Rea.

Note: Read this after you read 'Masca' as this series jumps right into it with no introduction and you will be confused if you read 'Masca:The Beginning' first

The boy who had everything taken away by the Novus Orbis Librarium which monopolizes power and governs humanity, obtains absolute power and declares war against the world. The story behind the possessor of the Azure Grimoire, the "Grim Reaper" Ragna the Bloodedge's battle begins!

From Aerandria Scans:

A collection of Mitsukazu Mihara's newest eight one-shots, printed in two colors. The stories vary greatly in mood and tension, but are nonetheless a perfect example of the artist's distinctive style. Their titles are:

1. Two Sweets xxx

2. Canariya
A short story about a Canary who was lost and her beloved who wants her back.

3. A Paradox of a Lion
4. Natural Born Scissors (Cut 1, Cut 2, and Cut 3)
5. Rikon Shiki (Divorce Ceremony)
6. What a Wonderful World
7. Tengoku to Jigoku (Heaven and Hell)
8. Chijou 10 Meter no Ori kara (From a Cage 10 Meters Above Ground)

Her day to visit the dentist has arrived and she just started to panic. She couldn't make one step closer to the dentist because of the terrifying comments she read on the internet. Are dentists really scary? Will they hurt her? But when she finally met the dentist, her heart just melted away at the first sight.

Masato kyobashi suffering from a illness which does not allow him to do any strenous activity becomes the manager of the school's swimming club.
It is a manga about his everyday life in the swimming club surrounded by beautiful girls.

Abe Takahiro is an ordinary, well-adjusted, high school student, who falls in love with his bespectacled classmate Asai Rumi, thinking she's just a cute member of the art club. Alas, his love is anything but ordinary - she's actually a hardcore yaoi-loving fujoshi who is utterly convinced Takahiro and Shunsuke Chiba, the handsome class playboy and his best friend from middle school, are having a torrid affair. With comical misunderstandings, awkward half-confessions, and the revelation that class idol Matsui Yoko is an otaku enamored with Rumi as well, poor Abe has his work cut out for him if he hopes to woo the Otaku-Type Delusion girl.

Source: Jmanga

Cute oneshot by 40mP based on the popular Vocaloid song "Kiritorisen" about a girl who meets a new transfer student.

From the manga habit:

Shiina is a serious man who has wanted to be a zoology professor since he was a child. He was infamous for always carrying around many massive books. Now 28 years old, Shiina is an associate professor who works diligently to train future zoologists at a university while looking after his childfood friend, Chitose. Chitose is also an associate professor in the biology department and apparently always walks around with penguins. So he is quite infamous in his own right. Chitose has a weak constitution and always needs Shiina’s help. This manga focuses on the trials, tribulations, and future of the young associate professor, Shiina.

From DMG:

It started out as a way to prepare for a future lover. Too long denied a flesh and blood companion, his substitute—a teddy bear—is now his love object. What happens when a persistent, excessively cheerful neighbor consumes his serious, carefully ordered life? An explosion of hurtful, panicked words.

Stepping back into his quiet life, he can’t avoid what his insufferable neighbor left behind: cracks that expose his festering loneliness. Only one person can fill those cracks, but he’s disappeared.

WEEKEND OF DREAMS: With her brutally honest, trembling line art, isino aya creates a companion collection to Sink into You. Love and acceptance, joy and sorrow, desire and disgust: they move beyond simple shapes in black and white.

What do you do when you have lost everything? Lloyd Lowell has found his answer. In Leon City, people are drawn to the torture of tower, Torcia Tower. There, it is rumored, lies treasures which can bring you fortune, fame and, most importantly—eternal life.

However, nothing goes as planned when Lloyd enters the tower...

Content in the tankoubon:
「逃亡急行」 - Toubou Kyuukou (Escape Express) (published in Petit comic, 05-07/2003)
Magazine reporter Natsumi comes across the scene of a murder and is captured by the youth who seems to have committed it. He insists he's innocent and the two go off to Switzerland together in pursuit of the real murderer!

「失踪都市」 - Shissou toshi (published in Petit comic, 01/1996)

「サルでもできるガーデニング」 - Sarudemo Dekiru Gardening


In the Bunkoban:
It has everything, but Sarudemo Dekiru Gardening, instead it has:

「死刑台の72時間」 - Shikeidai no 72-jikan - 72 hours of death stand (was also published in Umi ni Ochiru Tsubame)

「買って飲んであそんでデンマーク」 - Katte Nonde Asonde Denmark (Omake)