Goto Nagi has travelled to the southern island of Okitsushima, and ventures out to see Umi no Misaki, a striking cape jutting out into the ocean. But when he arrives, he finds that there is much more to this cape than a wondrous view. There is something peculiar about the cape, and about the island's inhabitants.

From tethysdust at MangaHelpers:

Minaguchi Kaoru is nothing special. He's no good at sports or school, isn't in any clubs, and he's not popular. He has no friends and isn't even interested in any of the girls he knows. He's also teased due to the fact that he loves shoujo manga. Unlike the harem daydreams of his peers, he dreams of finding his true love. Unfortunately, a shinigami comes to kill him, simply because he's a "forever alone" sort of guy. When he gasps out his intention of embracing life with his final breaths, though, she takes it back! As long as he follows through on his intentions, he won't be killed.

To convince the shinigami that his plans are genuine, he declares that he will confess to the girl he likes, the very next day. Expecting failure with confessing to random girls in his school, he sends out love letters to four different girls. To his surprise, they all agree to be his girlfriend. Now, this shoujo-manga-loving guy has ended up in a kind of harem story, quadruple-timing four girls! Will he be able to stay involved enough with society to avoid an early death?

There is fighting going on at a high school due to a power struggle for control. A beautiful young girl, the granddaughter of the director, requests help from a tough silly young man renowned for his genius fighting style. At the same time, other beautiful girls appear from the same high school who also want him as a teacher. Will he help and if so, which side will he choose to support? Or will he just show his true face with his bad boy ways?

From Chibi Manga:

The most popular group of idols.
Hina loves the leader of the group, Chiaki. After their representation, she was so excited that she came to see Chiaki. And they kissed!! Then, they started going out together. But Chiaki designated her as his "pet". Hina is so happy but will she support being only a "pet"...?!

In the 30th century A.D., in a world in which magic exists, 100 years have passed since the human race won a war against the Devil King. Even though the war caused many sacrifices, slowly but surely civilizations began to rise again.
One day, a virtuous child named Sai Akuto ("Worst Evil") is adopted from the orphanage he's lived in ever since a witch quietly left him at the church as a baby.
Five years later, Akuto passes the test to enter Constantin Magic High School. But after arriving and taking the vocational aptitude test, Akuto receives surprising results:
Examination Numbers: Number 021
Name: Sai Akuto
Future Occupation: The Devil King

In this screwball romantic comedy, Haruhi, a poor girl at a rich kids' school, is forced to repay an $80,000 debt by working for the school's swankiest, all-male club--as a boy! There, she discovers just how wealthy the six members are and how different the rich are from everybody else...

Includes 4 chapters of the story "Romantic Egoist" in various volumes, starring a pair of twins who play matchmaker with their fellow students, teachers and the like.

From ShoujoMagic: Iizuka Sono just transferred to a new school where the reigning oddballs have their own club called "BxB Brothers" ("B" for "Baka" = "Idiot"). According to them, you make your life meaningful by doing things out of the ordinary. ;) While Kazuhisa and Kei aren't too selective about membership, Katsumi is -- so it's just the three of them... Until Sono strikes Katsumi as an admirably unusual person, and he coerces her into becoming a Brother! The more Sono learns about the Brothership and Katsumi, the more pride she takes in being a Brother, but being the only BxB Sister has its problems. Caught between the open affection of Kazuhisa and the reserved admiration of Katsumi (with Kei taking school-wide bets on the side), all while struggling to register the club officially, it's a BxB Triangle that constantly takes on new angles!

The protagonist is sucked in to a weird whirlpool in a river and somehow ends up in a island in another world with native elves that wear leaf clothes, have the knowledge of an new born, and have sex like rabbits. That also have a body as weak as butter.
He decides to become the king of the place and rule with an iron fist and teach the naive elves cruelty, evil and watch as they kill each other.

First year high-school student, Toujo Basara, is now living with two beautiful step-sisters thanks to his eccentric dad. But Mio is actually the new Demon Lord and Maria's her succubus chaimberlain. Throw in a "reversed contract," rival demon tribes, and the ecchi situations mainly brought on by Maria for good measure, and you have a situation where Basara's life will never be the same. This seinen adaptation of the light novel mostly focuses on the said latter ecchi situations that occurs between the three main characters.

From Viz:
Akane is your typical teenage girl...until she swallows the Dragon Jewels, which transport her to the Heian period of ancient Japan! There in the capital city, Akane learns that she has been foreordained to lead the people as the Priestess of the Dragon God!

From Yen Press:

Life—or undeath?—isn’t easy for Ayumu Aikawa. A seemingly normal high schooler, he is in fact a zombie who serves as a bodyguard to an introverted necromancer. But his already complicated existence becomes even more outlandish when he accidentally steals the powers of a magical girl, transforming into one himself—complete with frilly dress and pink chainsaw!! How’s a reanimated corpse supposed to keep his head on his shoulders with roommates like these girls around the house?

With the destiny of searching for a bride, the youkai teenage boy came to Tokyo from a small island: Hanzou. A maiden who develops a youkai-attracting constitution at 16: Ichijouji Mei. With the youkai's heaven "Tokyo" as its stage, Girl-Meets-Monster love comedy.

Shimonone Takara, a young weird, healthy boy, has always wanted to be a "Strange Human". "Strange Humans" are people who possess an extraordinary power that can't be used by normal people. One day, Takara meets a woman named Aria who belongs to an organization. What does she want with him? Is Takara succesfully becoming a "Strange Human"?

Hundred - that is the only weapon that can oppose the mysterious life form Savaga visiting the earth. The protagonist, Kirasagi Hayato, aims to become a Martial Arts Master using this Hundred. He managed to get into the battleship university Little Garden. "I wanted to see you, Hayato!" "How do you know my name?"
Around the roommate, Emil Crossford, who somehow knows him well, Hayato gets an uneasy feeling. What’s more, just after the entrance ceremony, he gets asked for a duel by the campus’ strongest martial arts master Queen Claire Harvey.

After an accident our protagonist Amagi Kouichi becomes involved with Itanami-san a well known beauty of his school and secretly a vampire.

One day, a mysterious box arrived at Matsuda's door steps. The content of the box was none other than an android girl that insists that she's Matsuda's younger sister. Now, the purely otaku Matsuda has the privilege to live with a beautiful and submissive android sister that bows to his commands, or at least he wishes that were the case.

It centers around the travels and battles of one Aotsuki Ushio, who is constantly being stalked and aided by a gigantic, supernatural and sometimes invisible tiger (Some people describe it as akin to Calvin and Hobbes on acid).

Ushio's family maintains a Shinto temple in Japan, where 500 years ago, his samurai ancestor battled that same tiger to a standstill, and eventually trapped him against a rock using, a blessed spear called the "Beast Spear", which in addition to its intrinsic formidability as a weapon, can also boost the physical powers of the user. While cleaning out the temple storage, Ushio accidentally unseals the chamber which Tora was trapped in. Initially, Ushio wisely refused to remove the spear pinning Tora (とら, Japanese for tiger) down, as Tora unwisely makes the strategic blunder of mentioning that the first thing he would do upon being freed would be to devour Ushio; but Tora's unsealed presence attracts various demons to the premises, and Ushio is forced to free Tora in exchange for his help. The series focuses on their relationship, interspersed with battles against mythological foes, and with Tora's attempts to grapple with modern life and gobble up Ushio.

Won the Seiun Award for Best Comic of the Year in 1997. It also received the Shogakukan Manga Award for shounen in 1992.

Most girls are crazy about jewelry, but not Anis Yamamoto. Not since her father gave her a rose choker as a child, claiming it was a protective amulet which would safeguard her from harm; however, if she ever took it off (a feat easier said than done!), she would be afflicted by a “punishment” of some sort. Not like it matters to her though, since the attention it attracts around school from faculty and students alike isn’t something she’s particularly fond of.

But after a certain incident causes the choker to disappear, she realizes that this punishment her father spoke of might have been a bit more than she bargained for!

A tale of mystery and magic. Naito and Yuta Fuuga are twin brothers with very different personalities. While Naito is elegant and good in school, Yuta is athletic and often winds up in fights. Despite this, they maintain a close relationship. When their father turns up missing, both must travel to Dubai in search of him. A mysterious peddler has other plans though, as the twins soon find themselves in the world of One Thousand and One Nights.

Whilst searching for porn on the internet Sudo Kansuke, a 20-year-old university student, gets sucked into an RPG world called Munberdia. He is the chosen hero who carries the sword of light. Only the sword of light is not what you would expect.