Kaguya is a boy in an all-girls' school for demons [fox spirits, succubi, werewolves, etc]. Being the only human is bad enough, but the added risk of his manhood being discovered makes for silly and unbelievable (deliciously enviable) situations.

From Tokyopop:
Merleawe has left her hometown and moved to the capital city of Viegald to attend wizarding school. On her way to her first day of school, she bumps into a man who kidnaps her and takes her to the castle, where she is charged with an awesome task—impersonating the kingdom’s master wizard! Fearing war would break out if it was known the master wizard, Sylthfarn, was missing, Sylthfarn’s inner circle has decided someone must pretend to be him. Merleawe tells them that she will take the job!

But not only does she lack the ability to cast more than simple magic, she also has no idea who the master wizard was! Unraveling the twisted threads of Sylthfarn’s disappearance and keeping up the appearances of both master wizard and first year wizarding student makes Merleawe’s every day challenging, magical, and amazing!

Yamanobi Apartments have a story behind them: Anyone who lives there will gain something big, but lose something big as well. This is a collection of stories about the various tenants and their love lives.

1) Muroi Kaname has just moved into Yamanobi. The naturally unsocial Kaname doesn't care about stories, and also quickly manages to alienate himself from everyone in the building. But when his upstairs neighbor, talkative Fujimura, sees a different side to him, he's determined to be Kaname's friend. Kaname slowly lets himself grow closer to Fujimura, but will their friendship withstand the jinx?

2) Kamimura Mizuki has always chosen lovers for their looks, and gotten nothing but trouble. This time he wants a sincere guy, and he already has one picked out: Itokawa from his work. But getting his attention is proving to be somewhat difficult. At least slacker apartment caretaker Akabame always listens to his troubles...

3) Nojima is known as the life of the party, always light-hearted and in a good mood. But he's really a bundle of insecurities! He's hiding a secret love for cool classmate Kariya and has moved into Yamanobi for the jinx. But his secret love is slowly turning him into a stalker!

extra) Kanata has been in love with Soejima Ibuki for two years now, but he always sees Soejima-san with a new partner. Will Kanata be able to tell Soejima how he feels or will he suffer with an unrequited love forever?

extra 2) 3 short comedies on the residents of Yamanobi Apartments.

Mari Kurusu has had a crush on Kuro Rouzen (the weird guy in her class) for quite a while and when he eats her love letter she thinks it means rejection. Later she finds out his secret, that he is part of a top-secret organization that protects the humans of Earth and he brings her back to the organization to erase her memories. But for some reason, the organization choose's not to erase her memory...

From Nakama:

Hane Hajime, who spends his life lazing around and being dependent on others, is twenty-two years old. One day, having lost his way, he wakes up in a blood-stained bed, with the lower half of his body in full view and his rear end stinging-not surprisingly because he’s serviced a pair of twins! The curtain rises on completely innocent Hane’s new lifestyle as it starts to head for trouble. While he’s taken aback by unique adults, he finds kindness... or perhaps it’s love.

Werewolves, demons, monsters, vampires. All these ferocious creatures are afraid of the same thing: the beautiful Princess Hime, an awesome warrior who fights off the forces of evil with a chainsaw and a smile. Not only does she look great in a tiara, she has power that allows her to raise the dead. She's a girl on a mission, and with the help of her undead servant and a supercute robot, there's no creature of darkness she can't take down!

Kagome is a modern Japanese high-school girl. Never the type to believe in myths and legends, her world view dramatically changes when, one day, she's pulled out of her own time and into another! There, in Japan's ancient past, Kagome discovers more than a few of those dusty old legends are true, and that her destiny is linked to one legendary creature in particular--the dog-like half-demon called Inuyasha! That same trick of fate also ties them both to the Shikon Jewel, or "Jewel of Four Souls." But demons beware...the smallest shard of the Shikon Jewel can give the user unimaginable power.

Won the 47th Shogakukan Manga Award in the Shounen category.

The sweets shop owner Tanihara goes to for love advice with a stern, scary looking pediatrician. Though the doctor has one serious looking face but deep within he's a gentle soul. Not to mention he isn't afraid of showing his love or the fact that he's gay.

The game of "trick-or-love" between the happy-go-lucky father and the scary but popular pediatrician! Normally the paths of a shrewd man and a stoic man would never cross...

1. Before Saying that It is Love + On a Certain Sunday
A kind man, Suda Masayoshi, met a middle school brat, Hasegawa Souma, when he moved into his new house. Because of Souma’s complicated background, Masayoshi decided to take Souma in and raised him.

2. Don't Cry, My Little Lamb
Continuation of chapter 1 with the grown-up Souma.Two years later, the high-schooler Souma confessed his love to Masayoshi. A cute little puppy turned into a horny wolf, how would our dear Masayoshi handle Souma?

3. Reversal of Love Talk - Anri Story
Long-time lovers Anri and Satoshi have hit a rough patch. Anri's insecurities and jealousy grows everyday. Will these two survive their troubles, or is it time to call it quits?

4. Reversal of Love Talk - Satoshi Story
Continuation of chapter 3, except it is told from Satoshi's POV. Anri wants to end his relationship with Satoshi. What might the reason be? And how will Satoshi get him back?

5. Anata wo Matsu no (I Will Wait for You)
High-school student Kengo's pretty miserable when his girlfriend dumps him right before Christmas. Trying to keep his mind occupied by working at his family's bar, he finds himself thrown in with regular drinker Nishizawa whose kindness soothes Kengo.

6. Uncontrolled Puberty
Shuuto's attempts to control his feelings for his older brother's friend Yukihiro are failing miserably. No matter what he tries, the high school student can't stop fantasizing about his long time crush. But Yukihiro has no intention of letting Shuuto avoid him forever...

7. Passion Recycle
8-page short story about a sexually molesting shop owner and the employee who puts up with it.

8. Honey
8-page short story about a student trying to hide his secret crush from his overly affectionate best friend.

From Yen Press:

Cute and charming, but not so bright, little Rika is training to become a real wizard. The first step is to find a magic staff. That can’t be too hard, can it? As Rika and Eugen journey deep into the forest in search of this wonderful staff, Rika gets lost encounters the dark sorcerer who kidnapped the princess! Will Rika be able to free the princess and become a real wizard?

Always a very tall and stern man, Matsudo has recently joined the student council as the treasurer. To his distress the rest of the members of the student council are nothing but extremely gorgeous and lazy girls... Will he be able to say "no" when they ask him to do their work for them?

High schooler Jenny You is living a dream. In the public eye, she is a delicate princess, a successful pop star, but in real life, she's a rebellious beauty ostracized by her female schoolmates. She and her classmate, Eumpa Won (One), seem to have nothing in common on the surface. Eumpa is a quiet boy, ignorant of the pop culture that has enchanted most of his peers. Having spent his childhood as a depressed prodigy in the United States, he has now resolved to lead a normal life as a regular boy. He likes a cute-but-average-looking girl, Young-ju Chae. Young-ju takes him to a pop concert, and Eumpa is exposed to Jenny's music for the first time. Meanwhile, umpa's resolution to live a normal life is challenged when his music teacher steals the young man's music and attempts to pass it off as his own... So begins the story of One...

The story sets one month after Eita and Masuzu start dating, and sets itself on a "what if" scenario where the Harem element is stronger than in the original.

Otokojuku - a private school for juvenile delinquents that were previously expelled from normal schools. At this school, Japanese chivalry is taught through feudal and military fundamentals. Similar to an action film, the classes are overwhelmed by violence. Only those who survive it become true men.

from Renta!

From Intercross & Shoujo Crusade:

Chika has always seen Murasame-kun as a rival who manages to constantly piss her off. While wondering out loud to herself, her sister whom overhears Chika, gives her a perfume necklace which supposedly able to capture a guy's heart. The next day, Chika bumps into Murasame-kun and spills all the perfume. As she begins to apologize, he suddenly asks her out?!

From Anime Waves:

Meet Shizuki Maku - to say she looks "above average" would be a slight overstatement, but it's especially bad compared to her older twin brothers, the high-school heartthrobs Retsu and Tetsu. She always wondered whether or not she really belonged in her family, but things take a shocking twist when her brothers plant the suggestion that they may not be related after all.

Now she's supposed to pick one of them to be her boyfriend, all the while defending herself from all the other girls at school who want to keep her "brothers" for themselves! Life isn't easy when you're the ugly duckling!

Sonnan Ja Nee Yo received the Shogakukan Manga Award for shoujo manga in 2006.

Having lost the Sword of Light in the previous battle, Lina and Gourry continue their journey in search of a replacement weapon. On the way, the two of them meet up with Amelia and Zelgadis in the kingdom of Luvinagard while taunting some pirates. Lina is happy to reunite with her old friends, but appearing before her is Luvinagard's Inspector of the Special Investigative Unit; a man called Wizer. However, Lina is amazed at his unusual behavior...

Eight short stories:

1. Box Seat
About the silent exchange between a man and a woman on the train.

2. Kanojo to Kare (Boy and Girl) (3 parts)
A seductive beauty gets entranced by the strait-laced school boy who helped her out.

3. Thank You
A man in black perfoms his incredible choreography on the train.

4. Motto Motto...! (More...and More!)
About the encounter between an art student and his muse.

5. Hana Seigaku Kan no Hi (Heavenly Home Ec)
Visit the most popular maid café in town and meet lots of beautiful girls and one unusual maid.

6. Aoi Udedokei (The Blue Wristwatch)
What is a man to do when he gets hold of a wristwatch that is said to enable its first-time user to rewind the past ten minutes?

7. Hana Chibo (Five-Fingered Flower)
An extraordinary case of pickpocketing disrupts a town's peaceful everyday life.

8. Haruhiko Kikou (Haruhiko the Eccentric)
In a rural village, pair of siblings decide to accomodate a travelling mystigician.

From Shoujo Crusade:

Miyako's living her life diligently following rules, just as her deceased father wanted her to. But one day Azuma Koutarou sees her play guitar and blackmail her to join his band. How will she face it up?

There's also three extra stories that are unrelated to the main one.

Tatsuhiro moved to Tokyo to attend an art school and start his new life. In his new room, there’s a small hole in the wall. At first he can see nothing through the small hole, but one night, through the peeping hole, he saw a girl. That’s how his new life starts.