Part of a collection (fourth story) of a larger volume of itself, Vampire☆Vampire.

[From ShoujoMagic]:

15-year-old Hina is about to share her first kiss with her boyfriend Natuki and all of a sudden he transforms into... a vampire named Hibiki!?

From Tokyopop:

Guilt-Na-Zan is a vampire aristocrat who was sealed into a cross by Kyouji's ancestor more than 100 years ago. Now Kyouji has revived him--although his soul was resurrected into a cute female doll and can only transform into his real figure when he sucks blood from Kyouji's sister Tonae. But when you combine Goth clothes and hot vampires, slowly but surely everyone will start to feel like one big family!

Moe-chan plans to give Kyou-kun her homemade chocolate. However, will she be able to do this when the rest of the male student population is after it also? the sequel to Ookami Nanka Kowaikunai!?

Billed as Hayashiya Shizuru's "much-anticipated manga debut" it's a story of demon-possessed video tapes and Kurebayashi Mieko the "v hunter" who battles them. But in truth, she's just a pervert who *only* saves pretty girls!

From Attractive Fascinante:

Takamura Hikaru is a handsome prince. However, contrary to the rumours and his cool appearance, he’s weak, a crybaby and likes snacks and sweet things. He kissed his classmate, Sugimoto Yuu, suddenly and Yuu thought it was just a prank. Yuu took a liking to the prince, but is the prince serious about it? Will their hearts be finally connected?

The story of two best friends -- a girl who's convinced that she's a lesbian because of her "non-girly" tastes and a guy who believes he's gay because of his feminine personality, and their search for love.

1) Mimitabu no Riyuu (A Reason for Earlobes)
Yamaguchi is a notorious womanizer. Some men admire him; others can't stand him. Ishikawa is definitely one of the latter. Nevertheless, when Yamaguchi's latest girlfriend dumps him, Ishikawa jokingly offers to comfort him with his own body. Unfortunately for Ishikawa, Yamaguchi takes the offer seriously. And, to make matters worse, Ishikawa discovers that he can't say no!

2) Yubisaki no Biyaku (Love Potion Fingertips)
Ishikawa and Yamaguchi are dating, but Yamaguchi's lovey-dovey behavior makes Ishikawa sick. Hoping to put Yamaguchi in his place, Ishikawa suggests that they "see other people." But things take a turn for the worse when each one catches the other with a beautiful woman.

3) Kuchibiru no Teppen (The Top of the Lip)
Ishikawa usually wears an irritable scowl. So why is he laughing and smiling so happily? Is it because he likes homemade sweets... or the cute girl who made them? Consumed with jealousy, Yamaguchi's patience is pushed to the limit.

4) Tsumuji no Mannaka (The Center of the Hair Whorl)
Ishikawa's nightmare is in danger of become reality. His boyfriend, Yamaguchi, is trying to win over his family! Fearing for his future, Ishikawa forbids Yamaguchi to visit his home, but Yamaguchi is determined to get close to the Ishikawas, one way or another. If Ishikawa won't accept him, then maybe Ishikawa's sister, Hitomi, will...

5) Ushirosugata no Natsu no Neko (The Summer Cat Turns Its Back)
After bad news from the doctor, a man reminices about a young man he went to school with, but then young man appears and he hasn't aged...

Extra) Te no Hira no Ue (On the Palm of Your Hand)

1-5.
Togawa Ryouji is the new sales employee of a Toy Company. He and Kairou Reiji came into the company at the same time. They are just like water and oil and can never get along with each other. The management wanted them to cooperate to do sales out in the streets. Kairou always annoyed Togawa with his words during work. But when Togawa saw the nude back of Kairou in the changing room, he actually had a nosebleed!?

6. Sakura Ice Beauty
Fushijiro-sensei is known as a cool beauty, but playful sensei Takatou always manages to get under his skin. With Fushijiro's feelings for the older man tied up in a past incident that Takatou doesn't seem to remember, will he ever be able to sort them out?

7. Serious Love
Date is considered tight-lipped and is often given the tougher jobs as an enforcer in the Senwa clan. But when he's told to guard a beautiful young boy who seems determined to seduce him, Date may have met the job he couldn't handle.

8. The Aroma of Temptation
Researcher Yura's failing miserably at his pheromone project, and letting down sweet, supportive Mikimoto from marketing. Maybe Yura just needs some inspiring animal attraction...

9. Extra
In this twisted Little Red Riding Hood, exactly who's going to be eaten up?

From Attractive Fascinante:

Our Satou brothers are back! This time, it's the eldest brother, Satou Ryouhei, and Takahashi Jin, the cousin of the Takahashi brothers.
Jin woke up one morning to find himself being eaten up by a hunk (Ryouhei) who was sleeping beside him. Even though Jin ran away, they met again during the brothers' gathering. Is it destiny?

From Blissful Sin:

"Our meeting was fate"
Foreign Fortune-teller "Prince" falls in love at first sight with Salary-man Kazuto <3
"Prince"'s going to Kazuto's house every day brings about feelings of love. Dodging his courting by any means necessary is tough too but, even his friend Arasu makes passes at Kazuto...!?

1-3) Underground Kids
Everyday Kimi's belongings were searched and destroyed, and she always felt that someone was watching her. They said that the school’s secret organization solves all the problems within the school’s ground thus she gathered up her courage, and went to them for help. Little did she know, this organization actually consisted of 3 “Money-loving” people... can they solve her problem safely?

4) Fake
Miki rolls her eyes just by looking at the girls who are squealing over the beautiful guys of the Disciplinary Committee. She's got the braids, the glasses, the uniform, and the textbook to AVOID having contact with the Committee. No tardies, violations, or absences; now, because of that, she's part of the Disciplinary Committee!

5) Summer Love Paradise
Ichiha's friends take her to the beach with them, hoping she'll get over her troubles with her past four boyfriends. She unexpectedly meets the unpleasant lifeguard, Kouta, though.

"Is this what sex is?!"

An English nobleman, Earl Christopher (33 years old), lives a systematic and routine life. Due to his methodical way of life, he has been isolated from the living world and does not even know what sex is...
One morning, Christopher comes upon a man camping in his territory. Because of Kanamori, a Japanese gardener, part of his territory has been unexpectedly turned into a Japanese garden with a water fountain!
Kanamori expresses his liking to the enraged Christopher and suddenly pushes him down...

A nobleman's first time and a barbaric Japanese man in a field of grass!

From Toothpaste Scanlations:
Sakura always believe she would meet the mysterious guy again, whom she fell in love with eight years ago. But she only knows two things about him, which are that his name starts with the letter "K" and he has already left this city. One day, two transfer students... Kurokawa Sei and Azuma, who used to live here eight years ago, suddenly appeared. Not only that but they are twins as well?!

Promotional manga based on the hit Phoenix Wright videogame series by Capcom.

This fifty page manga was released along with a limited edition version of GS:YG in Japan. It features two sections, one focusing on Phoenix and one on Edgeworth, as they meet at a television studio.

A short story about a girl who is supposed to be a spirit medium, but her lack of self-discipline allows even the spirits of stray cats to take control of her body.

Young idol is a lesbian, so gropes and kisses another idol.

In the midst of several youkai characters with tremendous manifestations juggles a handsome 17-year-old Norito whose fate is tied to that of Tengu Koma's who, in turn, does his best to protect his younger human lover against the dark forces that seem to haunt him day in, day out.

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Extra story "Climax S"

This manga contains a series of one-shots that feature Hanai Shishimaru, the perverted boss of ‘The Help-for-Help-Seekers Room’, which will do anything for their clients except murder. Causing divorces, turning someone gay, ‘relieving stress’ on a crowded train…… Just how far will he go?

The first, fourth and fifth one-shots, XI -Extreme Love-, Fool and Shadow Game, as well as the extra, La décadanse, are sequels to Buddy System.

From The Zero Alliance: Sugita Genpaku made a contract with the demon in exchange for the ability to cure any disease. But if he doesn’t find someone to treat within the time limit, his soul will be taken!