From Yen Press:

One fateful day, Ryousuke Kaga, a typical hopeless romantic and hopelessly perverted high school student, has a chance encounter in the rain with a beautiful girl. After graciously offering both his home for her to dry off in and his help for anything she might need, the mysterious red-eyed beauty thanks him by stabbing Ryousuke in the chest! To further complicate matters, the girl, Lisara Restole, is actually a shinigami–that is, a god of death–and Ryousuke has somehow unwittingly agreed to let her use his “essence” to remain in this world. But instead of shaving years off his life like one might expect of a typical shinigami, Lisara seems more interested in…leeching the letch right out of him?!

Salad Days is a large collection of short love stories. Although almost all of them are unrelated some characters in previous stories reappear as a support character or as a main character if the author chooses to write more stories about the character.

There is a legend that the gods granted the hero a task, which is to raise a little girl into something extraordinary. In this story, this young girl is Yushi, a 17-year-old girl that has been put under a spell: her body stopped aging ever since she was ten years old. She has been selected as a candidate to become the next Puchi Puri Princess. The girl selected to be princess will receive a magical tiara which grants the wearer anything she wants. This means that if Yuushi becomes princess she can wish her spell away! However, the competition is stiff and Yuushi still looks like a 10-year-old girl. Source: Baka-Updates Notes: This manga details the beginning journey of Yushi becoming a candidate and attending an academy where she will be trained the modesty of being a potential Puchi Puri Princess. The story is to be continued in the anime version of this title

From Peccatore Sanctuary:

Murakami Keisuke possesses beauty which cannot be missed, many people admire him due to his beauty. But he has never accepted any one of these people. One day student council president Masaki, due to some incident started to become close to him...

Yukiteru "Yuki" Amano is a loner who never really interacts with people and prefers writing a diary on his cell phone with his imaginary friends Deus Ex Machina, the God of Time and Space, and Muru Muru, Deus's servant.
However, Yuki soon learns that Deus is real when he makes Yuki participate in a battle royal with eleven other people. Within this "Diary Game," the contestants are given special diaries that can predict the future, with each diary having unique features that gives them both advantages and disadvantages.
The rules of the game are simple: the contestants have 90 days to find and kill all the other contestants, and the last one standing will become the new God of Time and Space

This story is a love story weaved by a cursed girl, a cursed straw doll, and a mathematics teacher. A slightly sorrowful, warm love story that started in the season of spring.

From Viz:

Are the woes of the present meant to be endured for the promise of a better future or to atone for past wrongs? In a captivating epic of love, fate, and faith, seven young people must struggle with this spiritual puzzle as their alien past lives threaten the future.

When a transfer student arrives from Tokyo, Chizuru immediately develops a crush. Surprisingly, the beautiful and stylish transfer student joins Chizuru's group of friends. Will a closer relationship develop between Chizuru and Kanae?

Also contains two other stories (unscanlated) :

• Tojitete ne, Kokoro (Keep Your Heart Closed)
Azusa is Kiwako's older cousin by one year and they've had the same unchanging relationship even on until high school, even after Kiwako moved in with Azusa due to the death of her parents. They've always been close, but Kiwako decided to take it a little further. However, this now presents the question of whether it can last...

• Kore ga Koi nano ka Wakaranai (I Don't Know if This Is Love)

In a forest, there lived several demons, and one ugly monster named Kavo. He lived his days in loneliness until one day he saw a middle-aged man being assaulted by three other men. Kavo tears down the attackers, saving the man, Liam.

Liam is the first human to not scream and run away at the sight of Kavo -- in fact, Liam seems quite eager to repay Kavo for his kindness...via kisses and sex! Although shocked by his easy-going, smooth personality, Kavo is unable to leave the defenseless Liam alone and decides to be his escort through the dangerous forest. This is the story of an ugly monster and his human companion that is a total flirtatious beast!

From Manga Box:
Satoru Hasegawa, a young real estate agent, lives together with his equally young wife, Aya, and their daughter. Five years into their marriage, he's not particularly dissatisfied with anything, but he's got a secret that he can't tell a soul! Satoru is helpless before Sayaka, an escort, and Eri, his boss at work, and he's been carrying on lively affairs with both of them. But then he meets a woman with the faint aura of first love... This is a romantic suspense story about a man who can't tear his eyes away from that sweet but dangerous trap.

From Aerandria Scans:

Takamura Uru takes her mother’s remarriage as an opportunity to strike out on her own and begin a part time job. Filled with the thought of “If only I could make someone happy…”, she begins working at Café Bohneur, a shop famous for cakes; but the employees, Ichirou-kun and Shindou-san, turn out to be incredibly unsociable. These two, though frightening at first glance, begin to change something inside of her. This is the start of a romance about Uru’s search for happiness.

Contains the Oneshot "Suitei Seinen Shoujo"

From: Easy Going Scans

Moon Ah, the wandering physician has come with her assistant, to cure the disease of a high-class boy. After curing and helping the boy, it's time to part. However, the boy has grown attached to Moon Ah and he wishes to journey with her. With a new companion, Moon Ah continue to stride through the land of gods and mysteries.

From Phoenix Serenade Scans:

Seira Murahoshi, a 16-year-old girl, can see the auras of people. Because of that, everyone calls her a witch. One day, as she is walking to school with her only best friend, Mika, she meets a boy shining with a golden aura who rudely asks her if she is the "Witch of Himesaki", even after he breaks her sunglasses!

From Tenshi-Tachi:

Takuma and Mayu's story began when they were only 8 years old. During his childhood, Takuma was constantly hospitalised due to his heart condition. He soon became friends with Mayu, the daughter of the doctor in charge of his case. Day by day they grew closer and closer. However, the summer when Takuma was 8, he made a promise to Mayu that he couldn't keep... Their story unfolds as they grow older and their bond gets stronger...

This manga received the 53rd Shogakukan Manga Award for shoujo manga.

Extras:

• V.01 - Motto Ikitai...
There is a ghost looming in a hospital. Two little kids, Mayu and Takumi, are now scared after listening to the ghost story from a nurse. Was the story told by the nurse true or not? The kids decide to find out.

• V.07 - The Things I Want

• V.11 - Kare wa Ike mo Shinai Sarukoen wo Mezasu

1-3. Tooi Nemuri
After the death of his best friend, Chizumi, the young president of a sweets-maker company, decided to adopt his late friend’s son, Ibuki. As Chizumi watches Ibuki grow, Ibuki became more and more the spitting image of his father which made Chizumi unable to help but be reminded of the time when Natsume was still alive. Fortunately for him, Yatabe is always there to share his burden of the past among other things... And then one day, Ibuki confessed his love for Chizumi!?

4. Unmei no Anata
A high-school student who moves from partner to partner is in trouble when an ex-lover reappears looking for revenge.

This is all about a 16-year-old guy named Gan (family name: Goda) who, along with his various fighting-video-game-styled pals, opposes the very naughty Hanged Cross gang on an alarmingly regular basis.

As the story begins, Gan is a juvenile delinquent who has been booted out of one too many schools for chronic bad behavior. Gan's father, a hotdog supercop with the moniker of "Dan Goda," is fed up with this situation to the point where he decides to send Gan to his old educational institution: a fighting school called Roujuu Private High School. There, Gan learns to harness his raw abilities into "Gunfighting," the family martial arts style resembling firearms. Think .44 Magnum punches, Shotgun Fists, Sniper Stances, and you've got the essence of Gun-Fu down.

At his new school Gan also falls madly in love hot chick, Yuki and runs afoul of 17-year old transfer student and sure-to-be-rival Garrick Rider, prodigal master of the Hanged Cross technique. Fights over Yuki's affections take place in the school stadium, but it turns that she has little need for defenders of her honor. Yuki is, like an overwhelming majority of students at Roujuu, a fantastic fighter. And from here on out, everbody is not only "kung-fu fighting," but also busy filling pages with over-the-top battle scenes.

From MangaHelpers:
Yuto works for a magazine company known as "Kadokawa". His current project revolves around a mysterious phenomenon occurring inside the city. Someone or something has been placing stickers of a sumo wrestler's face all around the city in various places. No one knows who is placing the stickers or what their objective may be, but these stickers have been showing up in places for a while now.
Yuto now needs the help of an appraiser to solve this mystery. Searching through the web, he finds an appraiser known as the "Appraiser Q". Her name is Rinda Riko, and she has the ability to appraise anything (or anyone) and solve any mystery thrown her way.

"Things you want to do... Want to do it with me?"

Yuuki has a list of things she wants to do with a boy and Kiritani wants to help her?

This story revolves around Hasunobe Yoshinari's (Sweet - Ano Amai Amai Aji) older brother.
For Hasunobe Yoshitomo, co-heir and general manager of the first-class Royal Fort hotel chain, life is pretty sweet. The only bitter pill is dealing with the rival hotel chain that recently opened nearby. However, things start to look up when he escorts a beautiful drunken guest back to his room, but who is this mystery guy?