From ShoujoMagic:
The first collection of volumized short stories by the author of "For You in Full Blossom" / 『花ざかりの君たちへ』 ("Hanazakari no Kimitachi e").

1) The Dreaming Leaf (Yume Miru Happa) -
Futaba (=Two Leaves) departs for Tokyo to attend high school there. In order to relieve the financial burden slightly and achieve independence, she finds a live-in work situation at an old mansion. She becomes (fighting) friends with one of three good-looking fortune-telling employees there, Masato, who attends her same high school and is even in her same class. But then one day, Futaba discovers the secret of the old mansion... which is--!?

2) 17 Romance (17 Juunana Romansu) -
Natsume, now in high school, was raised like the son her father never had, and so she's determined never to lose out to any man. Homare Misono has been her guy friend for 17 years. Despite their closeness, Natsume always feels the disadvantage her gender places her at. Homare is stronger and better than her at a lot of things. And after saving her from a pervert on the streets, he kisses her...!?

3) The Law of Couples (Futari no Housoku) -
The Law of Couples states that all things happen in pairs -- including people. Sakiko seems to have found her missing half in Akio, a boy in her same class who always seems to say exactly what she's thinking. But who is she falling in love with? Akio, or the part of herself that she sees in him...?

4) 3) Heart Fruit (Haato no Kajitsu) -
Meron and her best friend, Chiho, both have a crush on Uchiyama! Meron finds out after she's already told Chiho that she has a crush, so she needs to lie about who she likes in order to protect Chiho's feelings. She chooses... Ryou! The scariest, coldest guy in school, rumored to be an underground ring leader! If anyone will reject her love confession, it'll be him! It works, but then Chiho begins to cry for Meron's sake, and Meron turns to mush... she tells Chiho that she'll try harder to win Ryou's love...!? How deep is she going to dig her grave?? But... for some reason, Ryou really doesn't seem that scary to Meron...

Nao Yoshikawa stays behind to live by herself when her parents leave to inherit her grandpa's farm in the country. On the day she moves into her new apartment, she discovers that it was rented also to Hisashi Uehara--a cute, super-cool, popular guy from her school. Not only did their housing agency unexpectedly close down, the landlord of the apartment tells them that they had to pay more for their apartment than they had expected. With no money and no home to return to, Nao and Hisashi decide to live together as flatmates.

*Contains a oneshot called
Kare to Kanojo ni Hanataba wo
(His and Her Fortune Bouquet) in vol. 1:
Harumi has been tricked by good looking guys before, but what if Kazuya is different?

Behold the the struggle of the adorable little cockroach Gokicha-chan as she struggles to make friends with humans after moving to frigid Hokkaido to escape the unfortunate reputation her species enjoys in the Kanto region.

From SCX-Scans:

Three girls arrive at a talent agency in the hopes of becoming a popular idol… Unfortunately, only one was selected. However, it is decided in the end they’ll combine their efforts and form a threesome idol group, Triple Booking!

Contains 3 short stories:

Chapters 1-3 - They'd been drunk. Or, more specifically, his boss had been drunk. So when Sakamoto jumped him, Kurahashi just went along with it. After all, it was just the alcohol...right?

Wrong!

At least, that's what his boss thinks...and said boss doesn't have a problem trying out a relationship with a colleague he thinks is in love with him. Unable to gainsay him, Kurahashi gets dragged into a relationship he never asked for - and finds himself getting deeper than he ever imagined.

Chapter 4 - Two childhood friends who abruptly drifted apart years ago are reunited. One of them is now a Buddhist monk... What does his friend feel about this?

Chapter 5 - The shy, reclusive, bespectacled Egawa confessed to Aoki on high-school graduation day...and was politely turned down. The two unexpectedly reunite in university, but to Aoki's surprise, Egawa has become a completely different person who's very popular with the ladies! But why does this cause strange, conflicting emotions within Aoki?

From Prisms:

A romantic comedy about Fuwa, a guy living in a small apartment in overcrowded Tokyo, who wants to have a place of his own. Because of a building accident in their new office building, Fuwa's company (5 employees) had to move into his apartment, right after he had moved to a larger place. And the new employee (Hiyama Izumi, a 15 year-old girl) had to move into Fuwa's place, as she had just come from the country. Then Fuwa's old girlfriend Tokiko, who had already gotten married, ran away from her husband and came to Fuwa's place.

Sana Kurata, a child actress, faces many problems in her classroom, including a major one - her bullying classmate, Akito Hayama. Sana's outgoing and friendly nature leads her to work towards correcting all of the problems around her. Her 'meddling' irritates Hayama but at the same time captivates him, just as Hayama's gloomy nature irritates Sana and compels her to change him. As these two opposites attract each other, they face many hardships which bring them closer to a mutual understanding.

This manga won the 1998 Kodansha Manga Award for shōjo.

Daisuke is a 23 year-old new schoolteacher. He ends up being put in charge of a 3rd grade elementary school class since the previous teacher quit, and in that class there's a girl who's quite a troublemaker--Rin Kokonoe. You could call her a masegaki (used to describe a kid that acts more like an adult in some ways), and she's also part tsundere (though more dere than tsun).

Peace seemed to have finally found its way into the Obinata household, but through an unexpected turn of events, Shuu and his adopted son, Yuuta, are faced with a disagreement that might change their forever. When their respective lovers, the eldest Obinata brother Taiga and Mayumi, the youngest, are dragged into their conflict, and Yuuta runs away from home, the whole family's living arrangement gets off balance. Will the peaceful days ever return?

Mainichi Seiten series:
Vol 1-2 Mainichi Seiten
Vol 3-4 Kodomo wa Tomaranai
Vol 5 Children's Time
Vol 6-7 Kodomo no Iibun
----Aki-chan no Iibun
Vol 8 Isoganaide
Vol 9-10 Hanaya no Nikai de

Rinne Ikaruga is just your average 16 year old girl, trying her best to get by. One day, she receives a package addressed from her sister, inside of which is a little girl who just happens to be part planarian and can multiply.
A planarian is a kind of non-parasitic flatworm organism.

A girl granting a little boy's wish...

Ohisama Egao collects the stories of the budding romances of three schoolgirls and one teacher - Aoi, Ryouko, Shizu, and Awada-Sensei - and also shows how their lives intersect at school, a small cafe, and elsewhere. Things don't always go smoothly with the schoolboys they like, but like the sunflowers that surround them, the girls keep looking for the sun.

- polm23

In the Noramimi universe, most families own a 'mascot'. These strange and amusing creatures live at home and act as companions for younger children.

Noramimi is one such mascot. Unfortunately for him, he is an ogre type and thus not popular with children, who prefer 'cuter' alternatives. Unwillingly, he decides to 'home stay' at "Hello Kids" - an agency that organizes matters between mascots and humans.

But, like all mascots, his heartfelt wish is to one day be adopted by a family...

The son of a famous pianist, music student Shinichi Chiaki dreams of studying abroad and becoming a conductor like his mentor. Unfortunately, his fear of flying grounds his lofty plans! As he watches other classmates achieve what he has always wanted, Shinichi wonders if he should quit music altogether.
Then one day he meets fellow student Megumi Noda, also known as Nodame. This oddball girl cannot cook, clean, or even read a music score, but she can play the piano in incomparable Cantabile style. And she teaches Chiaki something that he has forgotten: to enjoy his music, no matter where he is.

Winner of the Kodansha Manga Award for Shoujo in 2004.

Twenty-nine-year old Kurose Kazumi is a programmer in an eroge company and has played plenty of galges when he was younger, but he's completely uninterested in young girls. A chance encounter changes that when a confused middle schooler approaches him due to a misunderstanding, but he realizes how sweet she is and wants to keep meeting her.

Three sisters, Isuzu, Aoba, and Haruna, inherit an electronics store in Akihabara from their dead father, but their business is not doing well. Creditors have threatened to seize their shop if they cannot pay their bills. They find a heart-broken otaku named Takezou Muto on the doorstep of their shop, and he is able to save the day and the shop with his quick thinking. He is hired on permanently, and Haruna, the motherly sister, asks him to transform their store into a money-making enterprise. Takezou dreams of it becoming an otaku paradise, much to the delight of Isuzu and much to the consternation of Aoba.

Rikitaro is a musician whose dream is to become a rock star just like Jimi Hendrix or Jim Morrison, but at the age of 27 that dream is fading away rapidly.
Ooishi is a 3 time world boxing champion who recently retired and is now in the entertainment world, shooting a boxing reality show.
These two unlikeliest of people cross paths one day, but both of them think nothing of it until weeks later. Rikitaro is given one last shot by a record label to sign a deal but before that, they need him to get into better shape so that he is easier to sell. He stumbles upon a boxing gym which also happens to be the same gym Ooishi is filming his show.
As fate’s wheels start to turn, neither man realizes that they will work together to train the best boxer ever, even better than Ooishi himself.

A childhood dream has led Ha Min to work as a conductor for Pidgeon-ho, a slow-train in a backwater country. But the life of the slow-train is unexpectedly ending and Ha Min must transfer to another train in the city. People in the new railroad are different and he soon realizes that there are some things in the slow-train to be missed. On a closer look though, Ha Min discovers that not all is bad, and maybe his dream is nearer than he thinks...

Atsushi Ando (15) moves back to his home town with his family after 6 years. The story focuses on the fortunes and misfortunes he encounters in this town mostly due to pranks pulled by the ghost of his older brother, Hitsushi Ando, AKA Q-Chan, whose death prompted the family to move away in the first place. The catch is, only Atsushi can see his brother's ghost.

Takaki loves ranking the popular and beautiful girls at his school. The one standing at the top is the foreign transfer student Emilia Shutrause, and being a student from Europe, she is extremely popular among the male students at Takaki’s high school. Although he was just a spectator of this school idol, that would change when one day he accidentally bumps into Emily (Emilia’s nickname) and he finds out her secret...