From Tokyopop:
When Mink rushes to buy the latest CD by her favorite pop star, Illiya, she winds up instead with a software disc from the future that allows her to become whomever she wants. When she and her friends decide to program a Cyber Idol version of herself, all Mink's dreams come true. In fact, she is soon discovered as the next 'It Girl' and causes quite the pop culture sensation. However, Mink cannot reveal her true identity to anyone because using software from the future is a serious crime--and being caught could result in her 'deletion.'

1) 1K Apartment's Love
Kouno is the new exchange student and he hit it off immediately with Natsu his easy going classmate.

2) 1K Apartment's Roommates
Naomichi wants to leave his home town and get a taste of the big city life, and when his childhood friend Kei decides to go to university in the city, they decide to live together to cut cost.

3) The Ghost That Resides in Your Heart ~ first part
Kouno has been behaving weirdly and Natsu doesn't get the sudden change in attitude, and then he finds a letter that is address to Kouno...

4) The Ghost That Resides in Your Heart ~ last part
After the very public brawl in school between Kouno and Natsu, things remain as tense.

5) My Motive, Heart and Body
Naomichi is struggling to bring his relationship with Kei to the next level.

6) In This Little Apartment
Springtime is the season for reflection... Kei has just finished his second year of university, and the high schoolers, Kouno and Natsu, have just graduated, and Naomichi has just quit his third job since moving to the city.

7) No Matter Where We Are
It has been two years, Kei and Naomichi finally decides to move out of their 1K apartment into a 2DK apartment down the road. Kouno and Natsu offer to help them move.

A collection of one-shots:

Don't Say "I Love You"
Shizuka had just lost her only parent, her mother, due to a car accident. A young man, Yuuichi, rushed to the hospital and declared that he's Shizuka's step-father. That was their first encounter. The two started to live together, yet Shizuka realized that she was seeing Yuuichi as a man instead of as a father. And Yuuichi was too... in order to prevent the forbidden relationship, Yuuichi decides to leave home, and...!?

Snow Falling
Honjou Nao is known as a player and on Valentine's Day he kisses every girl who gives him chocolates. Furuya Wakaba wants to date someone she loves and loves her back not just some guy who wants to date casually. Furuya hates Honjou Nao because of his playful personality. On Valentines Day, she goes to the infirmary only to find a half naked Honjou Nao on the bed!

Let Me Feel You
Yuina has been going out with her boyfriend Yuuya for half a year already. One day Yuuya calls Yuina sexually frigid. Yuina becomes depressed and when a strange man approaches her, she goes along with him. Just before Yuina was about to do something she would regret, Hiroto comes and kicks the strange man in the head. Yuina becomes attracted to Hiroto's presence follows him to a club he's dancing in. They meet Yuuya along the way to the train station and there, Hiroto gives Yuina the kiss of her life!

Lustful Lover
Kazumi whose father is rich wakes up kidnapped. She's been cuffed and chained to a room. The kidnapper says that he will let her go only if she says "Please Hold Me" to him. Every night the kidnapper brings home a woman and makes love to her right in front of the door of the room where Kazumi is chained in. Kazumi becomes sexually aware of him and soon succumbs to him.

Omake (Love Prisoner and author's comments)
A six pages short sequel to Lustful Lover, what happens to Kazumi when she meets her kidnapper again.

From ShoujoMagic:

When her mother decides to remarry, Honoka inadvertently becomes "family" with the rising star she's infatuated with, Masaki Izumi! Honoka can hardly wait to become like the families in Masaki's TV dramas... but the guy himself is a far cry from the roles he plays. In real life, Masaki is seductive, rash, and forceful, and he's decided Honoka will become his woman...!? *gasp* But that would be... SCANDALOUS!

They arrive in silence and darkness. They descend from the skies. They have a hunger for human flesh. They are everywhere. They are parasites, alien creatures who must invade - and take control of - a human host to survive. And once they have infected their victims, they can assume any deadly form they choose: monsters with giant teeth, winged demons, creatures with blades for hands. But most have chosen to conceal their lethal purpose behind ordinary human faces. So no one knows their secret - except an ordinary high school student. Shinichi is battling for control of his own body against an alien parasite, but can he find a way to warn humanity of the horrors to come?

Won the 1993 Kodansha Manga Award for General Manga and the Seiun Award for Best Comic of the Year in 1996.

Romantic oneshot collection

1) Kimi no Himitsu (Your Secret)
2) King and Me
3) X-Mas for You
4) Under those Heavens

(Source: Simple Scans)

Escaflowne, the God Protector of Fanelia, has been stolen and the country is left in ruins. Desperate to find the key to Escaflowne's seal and recover the legendary guymelef, Van Fanel, Prince of Fanelia is sent to Earth, only to find it in the possession of a high school girl, Hitomi Hoshino. With enemies chasing them at every turn, can the two reclaim what was lost? Named Messiah Knight when serializing in Monthly Asuka Fantasy DX, but renamed to HITOMI when tankoubon were published.

Nemu is back home. What's gonna happen with Junichi's life after this reunion with his sister? "Da Capo" in Italian means "From the beginning"... then will we see the end to this romance?

A girl being anxious of her relationship with her boyfriend since there is still no progress.

*manga is based on a true story and the true story was done in 2ch*

It's about an Otaku guy who fell in love with this beautiful lady and tries his best to get that girl with a lot of help from 2channelers (people who goes/posts on 2ch).

This story has become very famous in Japan and I believe they now have novels, several series of Manga (both Shoujo and Shounen), movie, drama, play, etc, etc.

Takaomi Matsubue and Arika Togawa are second-year students at the same high school. By some strange quirk of fate, they started dating. Matsubue-kun is a really weird guy (in truth, other people just don't understand him), which causes Togawa-san to ponder: "Why do I like this guy anyway? Why do people fall in love?"

They encounter a baffling mystery: Tsugumi Yoshimoto, a girl who has been sleeping, sleep-eating, and sleep-walking for half a year. According to Touko and Rinko Mishima, sisters who are also well-acquainted with the structure and interpretation of dreams, this is a matter that concerns them all...

Naho is having trouble keeping her feelings in check when taking care of her sick friend Mana.

An unemployed bachelor meets an enigmatic vampire. What will happen? Find out in this hilarious webtoon. This webtoon is a Best Challenge on Naver.

The shinden (temple knights) are held responsible with the duty of fighting demons for the sake of the holy maiden, who's the symbol of the church. The holy maiden, unique to this country, exists to help save people from a mysterious illness that happens around the time of a new moon. Due to this, many people became followers [of the church]. Murray, a shinden, was brought up under the holy maiden's guidance, but, what kind of mysterious living is it if he supports the holy maiden, involuntarily? Even if he knew the church distorted its teachings.....?

Here, the curtain rises to Izayakaku's Sakamaki Yukisato as she gives us a twist to a fantasy world.

Nitou Saya, a 15-year-old scaredy-cat with a weak presence, suddenly finds herself ambushed by the infamous delinquent Kasai Arata-kun. To make matters worse, she ends up kissing him accidentally - and their bodies swap! Will her life turn into an awful disaster or will this incident develop into an unexpected opportunity?

From Slightly Sarcastic:

Sugawa Raika is a pretty normal second year in high school... except for her unhealthy obsession with good-looking boys. When she meets Tamaki Jun, a boy at her school, she is just as determined and boy-crazy as she's ever been. But Raika has met her match in Jun; he smiles sweetly at her advances, telling her nicely that he is, in fact, not from planet earth!

A collection of short stories:

- Boku no Hitsugi de Bansan o (Dinner in My Coffin)
On a cold white winter night, a dying vampire shares his last moments with a bitter young lady. Will their encounter change what fate holds in store for them? A silently fading final journey.

- Tasogare Renren (Longing for Dusk)
Kiriko's life changing encounter.

- Shinobigoto (Whispered Things)
High-school student, Chiya, encounters a tragic ghost in a pond.

- Hoshi wa Akatsuki no Kage (The Stars are the Dawn's Shadow)
Aurelia is a peasant girl fleeing an arranged marriage. Mihai is a young lord injured after a suspicious horseback riding accident. How are the two of them connected? And what will happen when they find themselves trapped in an abandoned monastery with some very sinister occupants...?

An alternate universe story starring the yuri couple of "Kannazuki no Miko" and "Kyoushiro no Towa no Sora" fame, Chikane and Himeko.

In this series Himeko is a nun who leds a peaceful but lonely life, having lost both her parents and her beloved older sister.

One day she finds a girl hung inside the church, impaled by a sword. The girl, who strongly resembles Himeko's dead sister, is still alive and calls Himeko's name. She reveals that her name is Chikane, but she has a memory loss about everything else.

From that moment, Himeko starts to be targeted by a group of people who want to obtain the "Dragon Cry", which is said to be hidden inside her body. Chikane (after trying to know Himeko "more intimately") vows to protect her.

Yamanouchi Kouya, the daughter of a famous author, is a shy young girl just starting middle school. She is named class representative along with Kannatsuki Yuuya, a boy she met on her way to school who frightens her a little bit. They are trying to work together, but he always seems mad at her and she is painfully shy. The thing is, Yuuya knows something that Kouya doesn't know yet—that her famous father is going to marry his mother!

Collection of short stories: - Maple Love Two college students become friends, but one of them has fallen for the other.. - Love Letter A girl asks her friend to give a love letter to a boy for her. Too bad she has no idea her friend is in love with her... - Cycling Under a Starlit Sky - Kawaii Anata (Your Cuteness) This is about a boyish girl who doesn't think she's cute, and her love interest, who does. - Winter-tinged Thoughts Shizuru is in love with Matsuri, who in turn is in love with Aya. Oh, dear. - A Lunch Made with Love Retells some of the events of "Winter-Tinged Thoughts" from Izumi (Shizuru's best friend)'s point of view.