A tale of obsessive love and constant pursuit, told over a 1000 years.
Escaping from a brother who had just ascended the throne, Yoshitsune, along with his servant, comes across a house in the middle of a desolate mountain. Oddly enough, only a young woman lives there, who seems to possess a very dark and ominous past.
This long journey of more than a thousand years focuses on our main protagonist Kurou. It can be somewhat confusing at the beginning, but once you understand the plot this story can be quite entertaining.
The main thrust of the story goes like this: Kurou meets a beautiful woman by the name of Kuromitsu, and begins a relationship which transcends life and memory. Kurozuka tells the tale of a journey undertaken by immortals, and those who chase after immortality.
The majority of this story takes place many centuries in the future, after Kurou has been separated from Kuromitsu. Having lost almost all of his memories, Kurou seeks to understand why he cannot die, to rediscover his identity, and to find the woman that haunts his dreams.

This series of stories started as just the oneshot Pure Love Strip, and then Doting Love Strip and Lavish Love Strip were released.

From ShoujoMagic:

Pure Love Strip
Yuuko is in her third year in Junior High (freshman in high school in US). She is a glasses wearing...four eyed nerd. She's suddenly getting tutoring from perfect Ryuunosuke-kun, but that is not the only thing that Yuuko is getting tutoring for...Yuuko's dangerous summer hoilday is about to begin!

Doting Love Strip
The continuing story after Pure Love Strip. After their first time.. he has started wanting it... every day!?

Lavish Love Strip
The continuing story after Pure Love Strip and Doting Love Strip. Perhaps the smuttiest installment so far? Yagami is tutoring Yuuko so that they can be in the same High School... But is his need for a wild sex life going to interfere with Yuuko's studies??

In the air above Okinawa, a strange figure is floating and disintegrating hellfire missiles from US helicopters. Experts from different disciplines and organizations have gathered to figure out what's going on.

"You want me to be nice 'cus it's yer first time? No way. Yer cryin' face is really cute."

1) Naughty Teacher and Student- High school student Ayase sees her chemistry teacher, Fugiki, (whom she is secretly in love with), kissing a married teacher in the music room. Fugiki catches her watching, and--after she teases him--the two share a kiss. However Fugiki now ignores her! What are Fugiki's real feelings? Will Ayase ever get to be in a real relationship with him?

2)Be Careful After School- Madoka is president of the art committee and a sadistic witch. When newcomer Yuki shows his beautiful and innocent face, she can't resist the urge to torture him a bit before making a move on his body.

3)An Angel's Prank- Asako's friend Miwa is an indiscriminate guy, who is always fooling around with every kind of girl. After a particular bad episode Miwa decides to date Asako (who's not exactly willing). Secretly she's always had feelings for him, but she knows it won't be long before he strays. But her biggest rival is...a dog?!

4)Dangerous Love Triangle- Chijiru has a crush on her classmate Maki, but he won't give her the time of day. When she sees a young boy being molested in the park she defends him, only to find out the "young boy" is Maki's older brother, Nakajou, a devil with an angel's face! Can her love for Maki withstand the pressure of Nakajou's sex appeal?

5)Hold Me Baby-Sequel to Kiss me Baby

Masumi is dating Tobita who under innocent face hides a burning desire for being abused. Catering to his needs Masumi gradually gets pulled more and more into the twisted relationship, fascinated by the feeling of sadistic satisfaction from dominating Masumi.

From Antisense Scanslations:

Lady Grey and Lize have known each other since childhood. Lately, Lady Grey has started to feel things have gone stale between them. Wishing to feel excited and extravagant in a relationship she wakes up to a blessing ... or is it a curse?

From ShoujoMagic:

Karate girl Seri tries to kick away her past in order to catch a new guy at a singles party, but Tamaki, a childhood flame from her old karate dojo, shows up to show off and makes her heart pound. Their reintroduction leads to a karate challenge, and if Seri loses, she must become Tamaki's "toy"...!? It's a game of love with more rivals and obstacles (and sex!--LOTS of SEX!) than either Seri or Tamaki could have foreseen!

Includes extra stories:

(Vol.02) Virgin Beast - Dumped for being a virgin, Katsuragi Mio decides to ask Virgin Killer, Tsukahara Masaho for help.

(Vol.03) Scarred Innocence - Naive Moeka wants to fall in love but Kamiya Shun might not be the nice guy she thinks he is.

(Vol.04) A Girl's Mischief: Love's Supreme Principle - Renai Shijou Shugi sidestory.

(Vol.05) Rescued Letter, Complicated Love - Nozomi delivers a love letter to Shigeyama Itsuya from her friend but...

(Vol.07) Ribon

(Vol.08) Flower of Despair, Thorns of Pleasure - Renai Shijou Shugi Sidestory. Takarai Kou's point of view.

Two soldiers from warring countries are bound by a pledge as master and servant. Taki Reizen is a commander of sublime beauty, shouldering the fate of his nation. Called "Mad Dog" because of his rough temperament, Klaus von Wolfstadt has sworn his loyalty to him as a knight. Despite this, those around them are cold and disapproving, full of various misgivings. For all their genuine feelings, what will come of love made cruel by the violence of war?

From Midnight Scans:

Eri is a normal high school student, who feels satisfied with her life, if there are Red Tea and sweets around. However, fate plays a trick on her, and she is assigned to learn the art of making tea from Secret Garden’s #1 butler, Ijuuin!! Mr. Butler’s lesson is exciting and strict, and, sometimes… pleasantly perverted?!

In the Shitsujisama to Himegoto series:
1) Shitsujisama to Himegoto
2) Black Label

1) Happy Cook
Chef Nakasawa saves Tokiya from trouble and ends up teaching him how to cook. But is it only cooking that Nakasawa will be teaching?

2) Straight Mind
Incoming freshman Kasuga has always won any fight he has been in, until he meets the elusive Tougou. Kasuga wants nothing more than to meet Tougou again and fight, but he is told to stay from Tougou. It seems that Tougou is the chief director's son, and a previous student was expelled for hurting Tougou. Can Kasuga stay away? Will Tougou allow anyone to get close to him again?

3) Happy Place
Stray dog... stray uke... Does it really make a difference?

4) My One-Sided Love
Kazuki is a game programmer who collects adult toys. He's also been in love with his neighbor Masato for ten years. When Masato asks Kazuki to teach him how to use a computer, will the time they spend together be all work and no play?

5) Restriction
Tsukasa may look scary with his piercings and blond hair, but the straitlaced head of the disciplinary committee is the frightening one! He ruthlessly uses Tsukasa who's trapped! But sempai will graduate in a year, then Tsukasa will be free, right?

6) Special Lunch
We go back to our original couple from ch 1 and a new type of dinner date.

From Attractive Fascinante:

The infirmary sensei, Odagiri, always said that students were out of his strike zone. One of the students, Izumi, kept coming back to seek a physical relationship with him. He heard that Izumi was a player, but he soon realised that it was Izumi’s first time when they started to feel each other up. Odagiri stopped at that very moment and told Izumi never to look for him again. However, Odagiri got upset when he saw Izumi flirting with another student. Was it love?

From Manga Abyss:

Part of a genius flower arrangement family, Suiren is secretly in love with Ayame. Suiren said, “I want to try to arrange you” to the Ayame…?

Collection of short stories:

1) Hard Triangle
Mutiple personalities, murder, rape and a shady past between a doctor and his teenage patient.

2) Doll
You and Yuu are cousins. When their uncle died he left a doll and one that looked like You. When Yuu asks if he can have the doll, You says he has to follow his every command.

3) Crystal Game
Playboy Gaku is in love with his stern best friend, Takayuki. But the jeweler only seems to notice the crystals he works with. When Takayuki offers to give Gaku a crystal treatment, Gaku has his own ideas of how he wants to be treated.

4) The Rusty Swamp

5) Silent Voice

from Blissful Sin:

"I wonder… if I’ve become lecherous."

High school student Hiroki yearns for his best friend Yuuji's father, Seiji. He has tried many approaches, but has only managed brief exchanges. Yuuji told the depressed Hiroki “I’ve fallen in love with you…Why don’t you forget about my father!” However, Hiroki bravely began the process of captivating Seiji. Before long, the aimless lover is being loved, Hiroki’s body being ravished…
In the shocking three part series, Idol Unit “Boku-chan’s*” series. Drawn for this special release, a tank-full of even more love, debauchery, and worthwhile reading collected in this omnibus!!

19-year old Narika Yoshikawa lived a poor life with her single mother. But when Narika's mother passed away, she was forced to follow in her mother's lifestyle, which unfortunately, also included her debts. One night, some men come to her door and demand 3 million yen that Narika's mother borrowed from them. She's saved by a strange man who pays the money to the men, and tells Narika that he just "bought her" and if she marries him, he will give her anything she wants!

A collection of short love stories: 1. Love Charge; Mao is a normal girl with a problem: she often wakes up early for school and because of that she gets pretty tired. So, In mornings she´s cold towards Minato, her boyfriend. She thinks its not really important, but...?! 2. Love Talk; 3. Koisuru Sekai No Katsumi De (Falling in love in corner of the world); Mikazuki is a shy girl often bullied by her classmates becouse of her looks and act. When the new transfer guy, Yoh, showed up: memories from past, mixed feelings within fear, came back for her. But Yoh suddenly cuts her hair...?! 4. Academic Rubber 5. My Dangerous Serious Boyfriend 6. Confession Box

Collection of tales of love between warriors. Good, solid artwork, if not the best available. Plenty of hard yaoi to go around here, too, if that's your bag.
If samurai themes appeal to you, this manga probably will, too.
by Shayne

The first oneshot, Hana Nite Sourou was scanlated by Atlantis-Dream.