From CMX:
Will a half-mermaid, half-human girl bring an end to the feud between humanity and the mer-people — or bring about the destruction of all life on Earth? As a merman named Shona is returning to his birthplace to spawn, he meets a young human, Jimmy, who suffers from amnesia. Together, Jimmy and Shona set off to find the missing girl. Will they be able to avert a mysterious prophecy, or will finding the secret of Jimmy's identity delay them enough to set Earth on the path to destruction?

For an unknown reason, 13-year-old Aki Kasuga seems to have killed her parents when she was found by her younger sister and detective Toru Takahira at the crime scene of lake Ezu near the Kumamoto city. As a minor, the girl joins a reintegration program and changed her name; from now on living as Sei Kamihara.

Ailey, the selfish daughter of a multibillionaire, "buys" her favorite rockstar in an intergalatical society and essentially forbids him from leaving her private planet, no matter how much he trys to leave. But as time goes on, the rockstar Marty, continues to resist, and she must either kill him or let him go.

About a robot, Jack, who appears frequently in Shimizu's SF stories. He's a robot with very human-like psyche. He once believed that he was human and he can even consume food, unlike many of the other robots of those times. While performing bounty-hunting duties on a strange planet, he has a flashback to the time he believes he was human... In this flashback, he and his partner are imprisoned and are given scarce food everyday. They share that meager meal, half and half. Yet as the days pass, the delivery of food becomes more scarce. His partner's strength is waining (she's a human being), yet Jack, though he feels the same consuming hunger as his partner, is physically still very apt. They're rescued several months later, but his partner had already died from starvation. Jack, who finds out for the first time that he's not human, still lives. (Source: PRISMS)

This is a collection of seven oneshot stories which were already published.

Released so far...

1) A Million Pound Love: a 80 year-old lady ask a 20 year-old playboy to marry her as a last wish, in exchange for one million pounds.

2) A Fairytale Judas

3) Noah's Spaceship

4) Metal and the Bride

1. A Passing Story
A school doctor recounts a romance from her own school days.
2. Pink
A love triangle. It's set in the same school as "A Passing Story."
3. Romance
A couple from the same school as "A Passing Story" and "Pink."
4. Lover
Continues "A Passing Story" story in the present.
5. Himitsu. (Secret Love)
A girl deals with heartbreak.
6. Toiki (Sigh)
Shiratori, now in college, despairs of ever finding love.
(Source: Lililicious)

On Kabuchi-jima, an island ruled by Princess Kaguya, ten children were raised as sacrificial victims. Several of the children thought they had escaped their fate when they escaped the island. But nearly a decade later, the kids are still dying in the order and at the time they would have as sacrifices... Their only hope now is to reunite and return to the island to seek out and destroy the source--the legend, the blood-lusting Moon Princess--before time runs out.

This is a one volume work which consists of 2 separate and quite long stories. The first one is science-fiction related and is... quite eccentric. The second one however is more down to Earth.
[From Dragon Voice Project]

If animals could speak, what would they say? This is a story about an abandoned lion that got picked up and raised as a cat. (Source: Dragon Voice Project)

Sayo and Nao are childhood friends and neighbours, but Sayo has been in love with Nao for years. With Nao being a year older than her, Sayo finds it difficult to confess her love for him because she believes he only sees her as a little sister. But when Nao tells her he's moving away, it's now or never...!
(Source: Day of the River)