On the seventeenth birthday, a virgin must be sacrificed. But why?

From Tokyopop:
An introspective, character-driven series, Tokyo Babylon reads like a manga version of The X-Files. Its story -- a modern-day fantasy -- follows a young onmyouji (spiritual medium) on his quest to protect Tokyo from evil spirits.
Teenaged Subaru Sumeragi is the 13th head of the Sumeragi clan. Together with his twin sister Hokuto and the mysterious veterinarian Seishirou, Subaru travels around Tokyo, calming the ghosts that threaten the city.

From Vampire Knights:

Touko is a 15-year-old aspiring actress who can be a bit of a liar. But thanks to one lie, she lands herself in the middle of an audition for a TV drama! A producer she meets there, Kyouichi, sees potential talent in her as an actress! She's found what she wants to do in life, but what kind of future awaits her?!

A collection of oneshots:

1) Tokyo Ants
A special security group consisting of highly-skilled people rescues a hostage.

2) Enma 1 & 2
Two different stories about people who can see electricity when someone tells a lie. (Enma 2 story by: Ookawara Ton)

3) Butterfly: Swallow Tail
About a boy who can see swallowtail butterflies around people who are going to die.

Since they were kids Sou has always been Rikiya's "subordinate", and now that they are in the student council things haven't changed that much... or have they? When a freshman comes into play, jealousy and secret plans are put into action. But is he really interested in who he says?

From Fantasyshrine:

High School Senior, Yokozeki Haruhito has always been watching the teacher-in training, Arisawa Yuya. However, this doesn't go unnoticed by Yuya's cousin, Yuma. Yuma volunteered to be Yuya's substitute. Things started to escalate when one day Yuya walked in on them while they were kissing...

After 17 ordinary years on Earth, Makoto Konno's journey was about to be ended by a freak accident. Then, life gave her a reset button. With her new found time-leaping powers, she immediately sets out to wipe off all the little annoyances in her daily life, from failing grades to iffy relationships she can't handle. But as her time-leaps get more frequent, she is forced to realize that every change she makes has profound repercussions that she can't foresee...and should her powers fail her, the consequences could be disastrous...

This was set as a prelude to the 2006 animated film of the same title, which was in turn loosely based on the 1965 novel.

Taken from CMX website

Kazuko is a high school senior who has no idea what she wants to do in the future. Alone one day after school, she discovers a broken beaker in the science lab. She smells something sweet in the air, passes out, and finds herself transported back to her own past! Will Kazuko use her ability to travel through time wisely or selfishly?

Based on the 1965 novel.

Toki is a Princess and she is to be wed to a Knight, to which there is mutual affection between but she still has concerns. Toki also has a second persona within her named Towa. Towa has blonde hair, and is much different from the reserved Toki as she is much more unyielding.

A girl named Miu stumbles upon a mysterious pawnshop where the only item for trade is time itself! Everyone always searches for extra time, but are they willing to exchange something that is more valuable and irreplaceable — their most precious memories? These memories could be wiped out forever if the borrowed time is not returned. Tokiya, the shop owner, recruits Miu to work part time as a "Time Go-Between." Her new boss is sweet, but he has his own motives regarding the time he trades. And Miu must always remember the most important rule: Never speak of the shop to anyone.

When Mimii was young, she was friends with Hoshiko. Hoshiko had to go to the United States because she was studying abroad. Mimii makes Hoshiko promise that they will always be friends. And this is where the story starts.

Meca shows up in Mimii's life 7 years later to become her friend, and to help her. However, Meca isn't exactly all that Mimii thought she would be. Meca keeps getting into trouble, saving people's lives, and summoning various people/robots/objects with her cellphone.

Short story collection of a variety of more mature Tezuka work. The story "Clockwork Apple" was borrowed from the book, before the movie was made, but has very little to do with the book either as Tezuka admits to writing it without reading Clockwork Orange.

1-4) Two years ago Masato fell in love with the gentle-handed Kazaoka (they spent a night together without telling each other their names). He searched for that man and found out that he's a writer and that he goes to a nearby café. Masato starts working there part-time, and Kazaoka starts coming to the café more regularly, but he does not seem to recognize Masato.

5) When quiet Kiryuu is dumped by his younger lover Takase, his stoic face hides his broken heart. Kiryuu's lack of outward emotions seems to be making Takase angrier and angrier. Will Takase finally snap or will Kiryuu...?

Extra) Playing Alone
A Mako eye view of the Kazaoka household and it's visitors.

- Fragments of Happiness

President Midou has been interested in waiter, Sakura Kaname, since he flew into his Midou's arms escaping a molesting relative.

- Part 2.

Persued by Midou, Kaname feels he can't trust him now matter how attracted he is.

- Story 2.

"I won't ever open up my heart to anyone else again. I won't like anyone else again. That is the only way I can protect myself from harm." Minato Yuuya refuses to accept the feelings of his kouhai, Takami Naota, because of his own past.

- Forbidden Lust

Asahina has been in love with Manager Kizaki ever since they met a year ago, but it could never be mutual, could it?

- Heart Throbbing Love

A teacher's promiscuous private life is discovered by a student.

A short full color story about a young couple imagining their holidays.

Taken from Wikipedia and Dangerous Pleasure:
After being devastated in the third World War (known as The Third Division), Japan was divided in two. Several years after the end of the war, a crime organization called Vischio has taken control of the destroyed city of Toshima (formerly Tokyo, Japan's capital city), where they are holding a battle game known as "Igura". The main character, a young man named Akira, is falsely accused of a crime. Once arrested, a mysterious woman appears before him, offering him freedom if he agrees to participate in Igura and defeat Igura's strongest man: the king, or "Il-re". The story follows Akira's life in the harsh, lawless Toshima as he fights both to survive and to unravel the mysteries developing around him.

After watching her first ballet performance, Morino Kurumi aspired to become a great ballerina. She entered Hosaka Ballet School and worked towards being the best of her group. Two years after starting ballet, Kurumi is still as eager as ever to become a great ballerina. She meets Hosaka Kazuomi, a young man who further motivates her to become the best. But moving up in this world wasn't so easy, as Kurumi soon gained a great number of problems blocking her goal. From the jealously of her fellow dancers to Kurumi's apparent shortness. Will Kurumi be able to become the great ballerina she has wanted to be?

Collection of oneshots. 1) A strange man hired a younger man to act as his new lover to get rid of his ex-boyfriend who's stalking him. It turns out the younger man is a student in the class of the older man... Sweet and a bit of angst. 2) True Blue - Momo and Harumi are childhood friends, and Harumi has always relied on Momo. One day he sees Momo walk into a hotel with an older man. 3-5) The Lover in the secret room - Kou and Natsume are good friends and also happens to the Captain and Assistant Captain on the schools soccer team. Natsume has always liked Kou, until he finds out that Kou is going to study abroad in France. Oda, who's also on the team has liked Natsume from afar. He confesses his feelings for him and then chains him up in his home. (slight bondage) 6) Kaoru and Sei have been living together ever since Kaorus' dad was sent overseas for work. Kaoru catches Sei making out. Sei tells him that he likes someone else, but he can never be with him.

A story about friendship. For those living in the village, hunting is an important part of becoming an adult. But what if you would rather make friends with your human food?

From Cinderella Story:
Yue Cheng is collecting cats for her homework report, and what she did is captured by the cats' "watcher". And after following a cat that she wants to catch, Yue Cheng and her friend found themselves in the cat spirit's territory. What will happen...?