Oneshot:

There is a saying that if you find a Japanese maple leaf with eight tips you will find everlasting love. A popular high school actress is now making a film about that legend at the main character's high school, who in turn has a crush on her. One day after school he runs into her and helps her escape from some pursuing staff members. It turns out that since she started acting right after middle school she hasn't had any experience with love and that is hurting the production of the movie. So to get some experience with love she invites him out on a date.

Included the following stories:

Volume 1: Koisome Momiji (Pilot)

Volume 2: FamiDol!
Daichi's, a teenage boy with little experience with women, life takes an unexpected turn of events.
After his mother's remarriage, he obtains a new sister, who is no other than the famous idol Asano Nanami.
What is Daichi going to do when they end up alone together and Nanami wants nothing to do with him?

http://comic.naver.com/webtoon/detail.nhn?titleId=395444&no=1&weekday=sun

One day while studying, Ikenouchi Jinta gets crashed in upon, literally, by a girl wearing magic boots who fell through his roof! However, these magic boots have one slight problem with them...

After Kusakabe Honoka is diagnosed with an untreatable disease, her father puts her in cold sleep in hopes for the future. When she wakes up, it seems all of civilization has been destroyed. All she has to help her in this future world is Haco, a dog-like robot that was created to protect her. What happened to the world while she was asleep!?

OneshotFrom saladesu:A strange bunch of supernatural beings have moved in next door to Hanazawa Meoto. They call themselves "Godland Company," and they're gods/spirits/demons who perform odd jobs to help other supernatural beings like themselves when they get into any trouble with humans. There's little Kuroto the Karasu Tengu, Mia Blutheim the vampire, Neruru Hearteater the succubus, Shadric Kagel the shadow earl, and the mysterious Haizono. How will Meoto react to her new neighbours?

From Project Bite Me! Scanlations:

From the creator of Touch and Nine, enter the world of Hirahira-kun Seishun Jingi! One of Adachi-sensei's lesser known works, it follows 7th grader, Hirahira-kun as he deals with the 8th grade bully, Daimyoujin and tries to gain the affection of his fellow classmate, Yocchin!

A short side story happens during the 8 years time skip of the original Ultimate! Hentai Kamen

It is the manga Umezawa made before his very succesful follow-up BOY and which tells of the adventures of Hibino, delinquent son of God. God gets enough of his son's behaviour and sends him down to earth to better his life and test him. The outcome of this will determine the future of the world, because God won't have his son succeeding him if he doesn't better his life and will end humanity if Hibino fails.

From Eternal Blue:

Basically, this manga follows Hibino Hareluya as he tries to "conquer the world" by dealing with the everyday punks on the street. Always ready to fight and always winning his fights, he just finds himself in more and more trouble. Along the way he surrounds himself with friends who are all very strong in their own unique way.

From AQUA Scans:

At the outskirts of town in a mansion, which is rumoured to house devils, live the masters of the household: the young miss (master?) Lily and the strange young master (a NEET) It. We follow them as they carry out strange requests, ones which normal humans cannot settle themselves.

Yet again, today, a young girl that wishes to find her black cat has paid a visit…

Once, there were two worlds that existed on this earth. In the sky where the deities lived was the Senninkai. On the ground where, of course, the people lived was Ningenkai. In the novel adaptation by Ryu Fujisaki, Houshin Engi follows Taikoubou on his mission to rid the Ningenkai of the evil immortals that have resided there. This colorful historically set manga keeps the reader on their feet and loving every minute of the in-depth characters and exciting adventures

With 18th century Paris as the stage, in the age of automates, the city is attacked and put under siege by a maniacal Count and his giant automate. It's up to Jeep to take up her family's destiny and call upon the support of her imprisoned uncle to defeat the wicked Count before he destroys Paris and its people!

Satou Yuuho gets called out by the cute basketball club manager, Koganei Mao. He thinks that it is a love confession, only to find out that it is only to help the basketball club...

From MangaProject:
The story of the Kasuga family, but mostly the oldest son, Kyosuke, as they move to a new town after being found out to be a family of ESPers. Kyosuke meets a pretty young girl as he counts the "100 steps" (there may only be 99) that lead to his new school and is immediately smitten. However, the pretty young girl, named Ayukawa Madoka has agreed to help her best friend Hiyama Hikaru win Kyosuke. Thus, a love triangle is born.

By night, junior high student Yoshimori Sumimura is a "kekkaishi"--a demon-hunter who specializes in creating magical barriers around his prey. By day, Yoshimori's got some other demons to battle: an addiction to sweets and a seriously crotchety grandfather! Yoshimori's pretty 16-year-old neighbor and childhood friend, Tokine Yukimura, is also a kekkaishi, but their families are feuding over who is the true practitioner of the art.

Won the 52nd Shogakukan Manga Award in the Shounen category.

The pilot for Kekkai Sensen.

Kannagi Ayano and Yagami Kazuma are asked to suppress an evil spirit that resides in the home of a collector of paintings. However, the original painting in which the spirit was sealed has been unsealed...!

From Esthétique: This is a crossover between Kanon (Key) and AIR (Key). Each chapter is a separate story of Kanon (Key) or AIR (Key), they're just short mini stories that were never seen in the anime.

Fuuma Kotaro, a ninja, is a Kagemusha (body double) for Houjou Ageha, a princess. He masquerades as her when they go to school.

High school student Akira Harisugawa has been in love with Mao Satomi, a girl in his grade, ever since grade school. The only problem? They've been best friends ever since Akira saved her from being hit by a car, and he doesn't want to ruin their friendship! That is until one day, when he finds a mysterious mirror...