In an ancient kingdom, a vicious warlord is on the hunt for a magical sword. Forced to escape his soldiers, the young girl who guards the sword is hunted until she receives some unexpected help from a pair of odd strangers.

Touka Aizuki is girl who can turn invisible and no one can see her except for one person, Ryoutarou Mimori.
Even though she is physically invisible, her love is completely visible!

Collection of oneshots. Most of these stories were reprinted in Filament.

From ADV Manga:

Private Investigator Loki is certainly an extraordinary fellow with an incredibly demanding profession. While his boyish good looks disguise his true nature, no challenge is too tough for Loki. He digs up evidence surrounding kidnappings, murders, suicides, and the like.

Not only is it Loki's job to solve mysteries, but he must also protect his own interests, namely his family, especially when those who want him rubbed-out enter the picture.

When old adversaries strike too close to home, Loki must prepare, not only to solve the crime, but to survive the vicious attacks! If the action's hot, you can count on Loki being there!

When the Isshiki family runs into monetary troubles, their last option is to turn to the God of Fortune who resides in their house. However, instead of helping them, he says he'd rather see their entire family destroyed!

Determined to save his family home, Tarou, the cheerful, good-natured younger son, takes it upon himself to uncover the secrets of Kami-san's past and figure out why their God of Fortune has turned into one of misfortune.

From Aerandria Scans:

Ever since ancient times, there have existed people who prevent the darkness of the night from swelling... They are the sorcerers, the only ones who have the power to oppose the darkness!

Sugawara has terrifying dreams of bloody murder. What could these dreams be about?

1) Incomplete Body
Masaki-chan breaks up with older lover Kyouji so he can date a woman. But he keeps coming back for Kyouji's cooking! Can they really stop seeing each other?

2) Incurable Love
A pop teen idol, Kawaguchi Kou, is stopped by his agent Nagano from seeing his high school friend and crush Gariyou. What does Nagano have planned for Kou? Gariyou's story is told in the oneshot One Sweet Night from Amaiyo Maiyo.

3) The Resting Snake
Shitsuke is a guy who likes older men. But when straitlaced student Tagawa chastises Shitsuke's lifestyle, Shitsuke decides to teach him a lesson.

4) Voiceless Night
Isao is a down and out clothing designer who rents a dilapidated workshop to churn out his works by himself. Ryouichi is doubtful of his ability to make ends meet but can't seem to stop fussing over him either.

5) Spiritual Apartment
Narazaki wanted to confess his love to Takemoto. But on that fateful day, an accident happened and both fell into the spiritual apartment.

6) Shameless Night
Takatou and Moriyama are enjoying each other's company on a regular basis, but Takatou convinces himself that it is all due to drinking and the bad economy. When he decides that the relationship needs to end, how will Moriyama react? Will Takatou be able to abide by his decision?

7) Between Hearts
Azusa has finally moved to where Harada is to attend university. Continuation of their story which started in Amaiyo Maiyo's chapter 8.

8) Freetalk
Omake.

Nora is a demon who often doesn't acknowledge the authority of the Lord of the Hell. Because of that he is sent to the human world where he becomes bound to Kazuma.

A collection of stories:

1. Hatsukoi Harinezumi (First Love Hedgehog)
Sora Onodera discovers he can use magic one day when he accidentally turns his older brother Riku into a hedgehog. Sora learns that his parents and brother can also use magic, and that he acquired the transformation spell because he's experiencing his first love. Now the only way to put Riku back to normal is to acquire the magic to undo the transformation, which has the condition that he must first get the girl he likes to tell him she likes him back.

2. Life for Life

3. Uno x Uno
Despite Mai and Yuu Shindou being fraternal twins and opposite sexes, they look very similar to each other and are surrounded by people who want them to act more like twins, such as wearing matching outfits or clinging more to each other. Amid this, Mai starts to realize that both of them are starting to change as they start going through puberty.

4. Simple Hot Chocolate

Once every five thousand years, the twelve beast kings do battle to determine their places in the zodiac. That time has come once again, and the snake king Jaou has chosen Makabe, the "queen" of her school, to be his proxy in the upcoming war.

A two-chapter short series.

A special short story that was published in a freebie book put out in Sho-Comi, then added as an extra in the last volume of Zettai Kareshi. Chima Nagatsu, a high school sophomore, has always been able to see spirits that have died but haven't passed on yet. She also has the power to banish them. One day she gets a job from her uncle asking her to banish the spirits in an all boys school. She reluctantly accepts only to find that one of the spirits, Tsukasa, is a boy whom she admires!

1) Shiki is Koto's master, and he makes cosplaying costumes for his maid Koto. Though Koto doesn't like it, he still pleases his master.

2) Shiki's brother, the young master, Shuka who falls in love with the gardener of the house. But it seems the gardener doesn't want to be much with Shuka because he is the master of the house, but in the end...

3) Story about Shiki and Koto.

4) Sakura-sensei, and his special patient Chigaya. Though Chigaya always tries to seduced sensei and asks him to make love to him and that he always loved him, yet sensei doesn't want to do anything because he's worried about Chigaya's body, but when Master Chiki sends him a cosplaying outfit for Chigaya, it seems that it takes effect on the doctor.

5) Continues the story of the doctor and his special patient.

6-7) Story about a tiger and his master. Thought the tiger becomes human, still with the ears and tail, the master is sad because he turned the tiger into a human, but the tiger doesn't think like that at all. He's happy to be able to talk to his master and hug him like a human being would.

From Tokyopop:

Imprisoned for a thousand years, eighty-eight fabled beasts seek resurrection from their world so that they can unleash their wrath upon present-day Japan. And a band of young warriors would love nothing more than to let loose these beasts so that they can feast upon the human world. The only thing preventing civilization's annihilation is the Girl of Water, who is lost in the human world--without any memory of who she is! As the elemental warriors continue their search for her, they cross paths with another of their kind: Ishigami, the Man of Earth. However, Ishigami is one who wants to stop the dreaded resurrection...

Due to continuing death of people close to him, Han Haje is called the demon possessed child. Then one day, his estranged ex-girlfriend, Ari, returns...

Makise Ryo, the student president of a catholic school, seems to be liked and admired by everybody, including his cute little brother even if the latter is somehow jealous of his older sibling. When Ryo gets abducted by delinquents from his school who wanted to "teach him a lesson";he's saved by a mysterious student. Gunta didn't help him out of sympathy but "just because they woke him up". Later, Ryo meets him again & weird things start to happen...