Keisuke and Makura are childhood friends who grew up together almost like brother and sister. One day, due to a misunderstanding they had, Makura left the house angry until Keisuke's Mom is worried about Makura not coming home yet, thus Keisuke is told to go look for her. Reluctantly, Keisuke went out to find Makura, He ended up at a place they used to go often, the sunflower field. Luckily, Makura was there. Keisuke joined her sitting on the bench and they began to reminiscence. When Keisuke decided that they should head back home, he phoned her mom to say that he found Makura, only to be shocked when her mom told him in panic to head to the hospital. At that same moment, he looked at Makura, who was not standing but floating in the air...

An eccentric witch chooses a useless scarecrow to be her familiar, but why? A fantasy romance that resounds in the heart!

Long ago, couple suicides were common, but some left with unfinished business. Now some 'destined couples' have been reincarnated in the present day. Each has a reminder of the past: a butterfly-shaped birthmark on their thumbs. When the marks touch, they catch a glimpse of their shared past, though what they see doesn't always match.
Tsubame insists that he and Kanoko are fated to be together. By the time Kanoko finds out it's not true, it's too late: she's already fallen for him. The "butterfly" friends must reconcile their ties to the past with their present desire for fun and romance!

A mysterious command arrives from a "King".
The life-threatening "Game" has now begun for the 32 students of the first year's B Class.
One day, all of the students in Nobuaki's class received their first message from someone calling themselves the "King", in which was written a baffling command.
That first command was very easy. However, the commands began to escalate until a life-threatening game had begun.
Failing to obey the orders leads to death!! Their friendships are being undermined by a bottomless terror!!

From Tokyopop: Natsumi Kawashima, an energetic fifth-grader, is obsessed with her fantasy of being the ideal, sexy woman. Rejected at every advance by the cute guys that she fawns over, she finally gets a break when she picks up a package of mysterious pink nuts that are adults only. Eating these nuts causes her to morph into a voluptuous adult, and she's offered modeling opportunities and suddenly becomes noticed by guys who wouldn't have given her the time of day before. But, she's still a kid inside and is about to learn that things don't always work out exactly as you hope they will...

Wi-Lan is a poor girl that was born in a poor fisherman family. She yearned to go to that high standard private high school. When she received the entrance letter, she was so happy, but then she became the laughter of the whole school for being the poorest kid in the school. She was teased and pranked. Until a few weeks ago, a new student transfered to their school, San-Yue. Wi-Lan had a crush on him along with the rest of the girls. When she confessed to him, he ran off without saying anything. Apparently, he and his family are hiding a dark secret...

From Tokyopop:
A smoke-filled alley in Chinatown harbors Count D's Pet Shop. The pets sold here aren't your everyday variety and the Count prides himself on selling Love and Dreams in the form of magical creatures that come with an exclusive contract. But buyers beware. If the contract is broken the Count cannot be held accountable for whatever may happen. A fascinating and macabre look into the very soul of human nature.

From Impossibility:

Morisawa Kai and Sato Tatsuki are best friends. However, unlike Kai, Tatsuki is completely unreliable, lazy, and ill-tempered. One day Tatsuki takes Kai out driving in his new motocycle only to get into a bad accident that leaves Kai dead. However, Kai's spirit ends up in a body of a girl named Fujii Marika. After seeing how cold and unaffected Tatsuki as well as everyone else was after his death, Kai transfers to his previous school in which he starts noticing flaws to Tatsuki's cool mask...

The Continent of Song is in chaos. The sinister secret society known as Demon Card is using the power of Dark Bring to destroy everything in their path.

The only things capable of stopping Dark Bring are the Rave stones. Unfortunately, the Rave Stones were scattered around the globe in an explosion 50 years ago, so now they must be collected by the Rave Master in order to stop Dark Bring once and for all.

This new task has been given to Haru Glory, a sixteen year old boy from Garage Island.

The World's fate now rests on the new, young Rave Master.

From TokyoPop:

After 1000 years of peace, the wolf god Fenris Fenrir has been reborn. She seeks to find the reincarnation of Balder, the most beloved God, as the land of Midgard sinks further into anarchy. They are both key players in the coming of Ragnarok, the time when fate and free-will shall come into conflict as the very nature of the universe is forever redefined.

RilleL:
Based on norse mythology, ragnarök is the term for the end of the world. Christian equivalence would be the last judgement.

The popular Korean MMORPG "Ragnarok Online" was based on this book.

From Tokyopop:
The story of a detective who becomes involved with a young boy with telekinetic powers and his violent sister.

The manga's main characters are featured in another series by the mangaka, FAKE, as supporting characters in Vol 3-5.

[From AnimeWaves]:

Chinami was born with psychic powers. She has always wanted to join the Psycho Police Force. However, she doesn't know how to control her powers, so she failed the entry exam. However, after being saved from a psychic criminal, she joins the Psycho Merchants instead.

[From Aku-Tenshi]:

In the center on a metropolis city lies a small, shaky-looking house. A normal... Okay... Not so normal high school student, Sakura Tetsu (and his family), who works day and night relentlessly to support his family's living expenses, lives there. All is normal until one day, people from the future, alien pirates from outer space, appear. The underground kingdom claims Tetsu's land. Will he prevail in protecting his own land? Or will he surrender his land into many more invaders to come? Yes... Weirdness and insanity ensues!

From Nagareboshi Manga:

The student council is full of strange, quirky people with clashing personalities. One person in particular, Tsubaki Kiyoi (nicknamed Tsubakiyo), has a special talent that only one other person knows about-- when she touches someone, she can access their thoughts and memories. But because of this talent, she is very introverted and damaged inside. Can she overcome her fear of coming in contact with other humans, and take control of her power?

1) Saikou no Kimi
All begins when Soga Naoaki went to complain to the president of the student counsil, Yoshizumi Sekai, about the reducing of his volleyball team's bookings. By coincidence, Naoaki becomes the vice-president of the student counsil because of the health of the current one. He and Sekai don't get along, but what happens when they have to organise the school festival? Also found in Koibito no Namae

2) Kimi to Boku no Itsu Pobun
Oneshot also found in Renai Jikaku Shoujou.

3)Kimi ni Ai ni
Oneshot also found in Takaramono.

4) Afterword

From Yen Press:

Millennium Academy is a school where elite vampires are trained to maintain balance in a world where humans and vampires, who possess far greater physical strength than their human counterparts, coexist. And commuting to this school is Aldred, the most distinctly un-vampire-like vampire to be found in the entire institution. But when Al encounters Kei, a human transfer student to the school, their destinies become intertwined, and the fate of their world as they know it comes to lie in their hands!

Classic short stories from Takahashi Rumiko. Many are comedies.

Volume 1:
"Fire Tripper" (fantasy, romance)
A gas explosion sends high school girl Suzuko and toddler Shuu 500 years into the past. But she lost Shuu on the way, and as a result, Shuu ended up in the past 10 years before her, and is 15 years old when Suzuko arrives.
"Maris the Chojo" (comedy, sci-fi)
A destructive alien policewoman sees a kidnapped quadrillionaire as her ticket out of debt.
"Those Selfish Aliens" (comedy, fantasy)
Aliens, the government, and fishmen implant bombs in a poor paperboy.
"Time Warp Trouble" (fantasy)
Warriors from feudal Japan inexplicably pop into a high-school classroom.
"The Laughing Target" (drama, romance, supernatural, tragedy)
When they were children, Yuzuru Shiga and his cousin Azusa Shiga were engaged. Azusa aims to make sure that Yuzuru stays hers, no matter what, but Azusa also has a dark secret...

Volume 2:
"Wasted Minds (Dust Spot)" (adventure, comedy, fantasy)
Follows a pair of two bickering government agents, both of whom have special abilities. (A five-part mini-series)
"The Golden Gods of Poverty" (gag comedy)
An unfortunate boy's scientist parents try to use him to make money, but they only succeed in contacting the Seven Lucky Gods, who happen to also be broke.
"The Entrepreneurial Spirit"
A woman leads seminars for a get-rich quick scheme.

Volume 3:
"That Darn Cat" (slice of life)
Takahashi Rumiko remembers having to take care of her neighbor's cat.
"When My Eyes Got Wings"
A couple befriend a sickly child with a secret and his destructive pet bird.
"Wedded Bliss" (comedy, romance)
A wedded couple can only let out their tension from working all day by fighting with one another, until their neighbors threaten to have them moved.
"Sleep and Forget"
A girl relives a past life involving her lover and an evil witch back from the dead in the form of a dog.
"A Cry for Help"
A fairy gives a boy a frightening split personality thanks to the wind-up key she inserts in his neck.
"War Council"
Student councils go to war with one another over a stamp.
"The Face Pack"
A man can change his appearance at will and leads a "masters of disguise" club.

more info here.

Compilation of short stories:

1) 1000 Years, I Love
Hakua is sent into the mountains by the village to kill a ferocious tiger that has been attacking villages. The tiger, mistaking him for a girl, drags Hakua into the mountains to become his mate. Love soon blossoms as Hakua must teach this half human creature the meanings of his new found emotions.

2) 1000 Years, I Love Extra
Their love going strong, Hakua decides to go back to the village. Naturally Youko tags along and runs into some trouble in the human world.

3) Lying Words Honest Kiss
A slave merchant Kouhaku steals a beautiful boy Enji to sell him to a public house. Little did he know that the boy wouldn’t mind at all.

4) Fallen Warrior
A doctor’s apprentice Suiki finds a wounded samurai in the forest and takes him to his home to treat. The samurai Genka is really bad-tempered and the boy has bad history with samurai.

5) The Flower of Love
Story about an artist Sekka and a beautiful boy Joka he saves who later comes to serve as his model.

6) The Path of Pure Love

Shiina Momose doesn't believe in fortune telling and the occult, but for some reason, she can destroy anything with a touch. One day while on her way to school, a young man approaches her and claims to be a God. Furthermore, he believes that he was guided towards her and for that reason he has become convinced that she should become his first follower! Naturally, Momose refuses; but when strange things began to happen... she can not do something about it!

As a descendent of the famous exorcist, Abe no Seimei, Yuuichirou has always been able to see ghosts. Yuuichirou, as a child, was proud to be a son of the Seimei Shrine and wanted to follow in his father's shoes and become an exorcist until he's bullied by Ishida in elementary school. Now, as a teenager, Yuuichirou has lost his faith in Seimei. Can a visit from Abe no Seimei, himself, restore Yuuichirou's faith and close the rift between father and son?