It starts from where the last season left off, Aito and Ashisu meet her new assistant. The entry of a new member. What story can she make out of Aito and Ashisu's life?

Follow the adventure of Caisar, the chef on the spaceship of Manado, a group of sexy monster hunters!

Keitaro has had great difficulty getting into the university of his choice and no luck in meeting women. In a desperate effort to go into seclusion and study for his entrance exams, he volunteers to take over running his grandmother's hotel. His plans are ruined when he discovers that the "hotel" is actually an all-girls dormitory and some serious distractions ensue.

Note: Won the 25th Kodansha Manga Award for Best Shounen in 2001.

From Shinnen:

The Hachiouji family hunts demons in the darkness. The heiress of the Hachiouji family, Takamichi, lost her older brother at a very young age. She isolates herself, but, one evening, two werewolf pups are given to her. After just a few years, they have grown quickly, and they even go to the same senior high school that she does!

After his happy-go-lucky lovestruck parents suddenly decide to go on an amorous traveling adventure, Yuki is shuffled off to live with one of his dad's old friends. He knows very little about his new living circumstances, save that his dad's friend is an author with three children.

Something seems a little off about the girl who's sent to meet him, the fidgety and overly anxious Aya, but he doesn't fully understand what's going on until he arrives at the house. Yuki, who has had very little to do with women thus far in his life, is now set to live in a house with four of them. The head of the house is actually an author of erotic novels, and she habitually forces her three daughters into embarrassing sexual situations. How will Yuki cope with his new life?

Saitou, a rather arrogant kid, announces his super power to his class on the first day of high school. He imagines that it will make all the girls swoon, and he'll be crazily popular. Unfortunately, his ability to bend a spoon looks more like a cheap trick than a super power, and everyone laughs in his face.

Soon he learns that he is not the only kid with superpowers at the school, and there is even a Super Powers Research Club. He soon finds himself dragged into the society of a friendly invincible girl, a violent telekinetic girl, and a mind-reader. Rather than being swooned over, Saitou appears to have the least impressive ability of the group! Is there any way for him to get the happy high school life he was hoping for?

A calm, quiet life at a new school is just what Aria needed. Unfortunately, it's not what she got! Chosen as Student Council President on her first day, Aria's attempts to just fit in are ruined by her nosy new classmates. Since she can't beat the use of her mocking former nickname, "The Lovemaster" she decides to go with it and turn the Student Council into a dating service! That's great for the school, but will Aria ever solve her own love troubles?

From Badam:

Izumi Koutarou's family have lived in Izumi Hot Spring for generations. But the spring suddenly dried up a couple of years ago, resulting in a huge family debt. As they prepare to skip town to flee from debt collectors, the guardian deity of the house, Konoha-sama, appears. Konoha-sama, (who was supposed to be a really fearsome god), appears instead as a cute girl--wearing no clothes. What will happen to their family debt problem? And what is the power of Konoha-sama?

Yaneda Shigeru is a guy living alone with his cat, Konbu, until she turns mostly into a human (she keeps her cat tail and ears) for unknown reasons. Though to Shigeru, this isn't a problem; he has a cat-girl fetish. The problem is, Konbu is stuck-up and wants everything to be elegant to fit her high-class tastes, even her name to be something more high-class. So, they each want to mold each other to their tastes; Shigeru an elegant butler, and Konbu an obedient, cute cat-girl. Will one of them win, or will they come to some sort of mutual understanding?

First princess in line to the throne of the Principality of Rivetaria, Lena Reena Rene Risheranto, is an overseas student in Hyuuga Nobuyuki's class. She has silky blond hair, clear blue eyes and a childlike face on a developed body and her personality is that of the ideal princess.

In order to pay for the debt that his parents left behind, Gin accepts an escort job from the bill collectors of the Tokugawa Group conglomerate. The client is a girl named Hikari who goes to Tokugawa Private Academy. Using the experience he gained from his previous part-time jobs, Gin protects Hikari along with the other escorts, Suke and Kaku. However, Hikari seems to have a hidden secret...!?

Minazu Aruto loves reading novels and short stories so a classmate recommends a club that the school has called Philosophia. The classmate doesn't really know what the club is about but the name sparks a curiosity in Aruto and he decides to find out what it is.

He goes to the old library on campus where he meets and is introduced to all three members of the group: Tomoe, Takaho and Kaede. Still without knowing what the Philosophia club is about, Aruto finds himself joining what he thinks is a literature club.

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.

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!

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.

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.

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.

Without doing much research on the school or surrounding areas, Hibino Ryouichiro picks an art school in Hokkaido. Tricked by the school advertisements, he goes to the campus only to find out it is a desolate and cold campus. The only glimmer of happiness for Ryouichiro are the girls on campus. Just hours after meeting Kisaragi Riho, the cute girl on campus, she seduces him only to find himself outside naked after she is done with him. Feeling heartbroken and used, he finds comfort in Aso Tomoe, who lives on the floor below at the dorms. Although it is freezing outside, it is hot underneath the sheets for Ryouichiro.

The manga is separated into 3 story arcs with close to none relation with each other's characters.
Volume 01-13: Video Girl Ai
Volume 14-15a: Video Girl Len
Volume 15b: Video Girl - Complete Story (about Video Girl Haruno)

Video Girl Ai [From Viz]:

High-school student Yota Moteuchi is so unpopular that his classmates have given him the nickname "Dateless." So it's no surprise when the love of his life, Moemi, is not interested in Yota but instead is in love with Yota's best friend, Takashi. Yota turns to a video rental shop for comfort, but little did he suspect that the shop was magical and that the cute girl on his rented tape would pop out of the television and try to fix his ruined love life!

Ten-year-old prodigy Negi Springfield, has just graduated from magic academy, and in order to become a master mage he is sent to Japan to teach English at an all-girls middle school. But Negi has a bigger dream than just becoming a master mage. He wants to find his missing father, "The Thousand Master", the strongest mage that has ever lived. And he soon finds that searching for his father wont be as easy as he first hoped. In fact, it pushes him and his students into life-or-death battles that decides the fate of millions.