From Mangascreener:
In a different world than the one we live in, a world where Japan is the lone superpower of the world, there is a wildly popular game show called the National Quiz. Every night, people dreaming of riches, fame, vengeance, and happiness compete on the show, for the chance to be granted a wish, any wish they have: the National Quiz has the power to make your wildest dreams come true. It also has the ability, if you lose, to make your life a living hell.

This is the story of K-i K-ichi (aka prisoner KK47331), a former actor-turned losing National Quiz contestant-turned wildly popular host of the show, and the people and events surrounding him.

Oneshot from Sono Kuchibiru, Itadakimasu

Miku and Natsume have always been fighting with each other until Natsume suddenly asks Miku to pretend to be his girlfriend!!! At first, Miku is quite opposed to the idea, but slowly… This mismatched couple, of a super tall guy and a girl often mistaken for an elementary student, fall in love.

From Shoujo Crusade:

Kyouka, a sixteen-year-old, will be a winner today, the first day at the new school to which she has just transferred! She will definitely get a great boyfriend and say her goodbyes to those lonely days!! Kyouka has two brothers who love her a lot. Every guy who comes close to Kyouka is kicked out by them, thus she has no boyfriend. But she finally found an ideal prince... or that's what she thought. This guy, Maki, is actually a perverted prince!?

* Also includes two short stories in volume 2:

• Nanisama?! Oresama
Satomi loves Yuuya a little too much and is totally wrapped around his little finger. But, if this continues, instead of becoming his girlfriend, she'll forever remain his gofer. Will Satomi do something to find out exactly where she stands with Yuuya?

• Ijiwaru wa Kuchibiru
During Shiori's fifteenth spring, she fell in love with the idol Shuu Kitamura. She was even lucky enough to get to meet him in person, but she realizes he's nothing but a fraud! However, due to certain circumstances, Shiori becomes Shuu's personal assistant!?

Arisa is a former yankee [delinquent] who changes her ways to gain the attention of Ren, a studious boy. Her efforts finally pay off when Ren asks her out. She's supposed to be really happy now that she has him as a boyfriend, but for some reason she can't stop thinking about Issei, her next-door neighbor. What happens when Issei forces Arisa to be the lead vocalist for his band? Arisa has to decide: who does she really want to be with?

From Tokyopop: Nanaki survives a car accident to discover he is psychic. Recruited into an organization that solves cases with psychic powers, Nanaki's average life quickly turns into one of adventure and intrigue. Slacker Nanaki Shunsuke's life is turned upside down when he's hit by a bank robber's car and later meets a strange boy who claims that the accident caused Nanaki to develop psychic powers and that he is required to join LOCK, a paranormal investigations agency or be the suspect of any and every suspicious case that turns up. (thought a summary and categories were need since there weren't any :P If your into Shonen it's a good read :P Sirenic Griffin){Corrections by Silvermagic}

1-3) Blue Grey Dream
After the failure attempt of eloping with his customer, Shiki (Purple Ghost), a male prostitute, gave up his hope for love… until Ootori-sensei came along. Will Shiki finally find what he had been looking for…!? So what if there's a huge gap on their social standings, what's so wrong about living and loving for the moment? Enjoy this forbidden love story in the red-light district.

4) Untied Heartbeat
Shinobu and Washizaki parted ways in the most terrible of circumstances and after the many years that have passed, Shinobu is still scarred by the incident. When Washizaki returns to Japan and seeks treatment for cancer at Shinobu's hospital, Shinobu must face his past and find a resolution to the difficult feelings he's hidden deep inside.

5) Heartthrob Prince
Noriaki, a normal Japanese high school student befriends transfer student, Zeid, a prince from overseas. As Zeid accustoms himself to Japan, Noriaki, although frustrated with Zeid's broken Japanese, finds the prince increasingly more charismatic and charming. Can Zeid charm his way into Noriaki's heart, and ultimately, his bed?

1) I'm Not Your Steppin' Stone
Construction worker Sakai Kazuya is a 23-year-old man in love. Unfortunately, the object of his affection is the younger sister of Ezumi Masashi, an 18-year-old elite whose house he has been working on. In order to dissuade Kazuya, Masashi lies that his sister is only interested in high achieving men. Masashi offers to tutor Kazuya so he can pass his senior high school exams, but will Kazuya be able to afford his extortive price?

2) Tell Me You Love Me
Masashi's classmate Saitou tries to get between him and Kazuya because he deems Kazuya as being an obstacle to Masashi's success.

Extras) Break Time
Saitou starts dreaming during class.
A Day with the Stupid Couple I
A Day with the Stupid Couple II

3) Lovely
Kazuya insists on taking the exams despite the fact that he is no longer interested in Natsuko. He bans Masashi from seeing him till the exams are over but then Masashi sees Mogi Kousei pulling Kazuya's pants off?! (features Mogi Kousei from Kawaige)

4) Marshmallow Honeymoon
It is summer and Masashi wants to go on a holiday with Kazuya but the latter has work lined up so he can afford the new air-conditioner.

From Nakama:

Kaibara Yousuke is a third-year college student looking for employment. During his second year, he'd immediately rebuffed his classmate Nakayamada Kazuki's offer: “Won't you have sex with me?” But that time, Kazuki's declaration of, “I could make you feel so good, you wouldn't be able to think of anything else,” was the beginning of their relationship. At first, Yousuke would shy away from sex, but he was healed by the unexpectedly tolerant Kazuki, and was gradually captivated.

A small intense boy, Fei, suddenly appears in front of Masaki who just got dumped. But why does he lick her tears?

Jinny is a famous model with those gorgeous long black hair but little does everyone knows that she is in fact actually Ahjin, a high schooler who has short hair, wears glasses and only does modelling for the sake of her uncle! Ahjin has a crush on Dohoon, one of the coolest guy in school. But when Ahjin (dressed up as Jinny) found out that she'll be living in the same apartment as her crush, she's thrilled! But how can she keep her secret from Dohoon, whom he himself adores the model Jinny!?

Haruka is a owner of a dog; however, the dog is no ordinary dog. He is the wildest boy in her high school. What exactly is their relationship...?

The fate of the world rests on one man's shoulders. Or, to put it more exactly, it rests on his balls.
In a freak sealing accident the Queen of Terror is sealed into Satou Kohta's balls, thus preventing her from reigning destruction on the world. However, a lesser devil, the incompetent horned tsundere loli Elyse, has been sent up to Earth to release the Queen at all costs. The only way to do so is to make Kohta ejaculate, and Elyse only has 30 days to do it.
The battle for mankind has begun, in Kohta's pants.

1-4.
Asagami was kidnapped and found himself on board a yacht when he woke up. The one who appeared in front of him was his kouhai, once a beautiful and gentle angel, Fubuki. “Senpai never came to look for me after graduation. So I want to make you mine even if I have to do it by force.” After saying that, Fubuki did everything he could. He’s so obsessed with Asagami and even put aphrodisiacs into his food. Will Asagami give in?

5. How to Raise a Boy (Side concerning the secretary who appears in chapter three)
Super elite secretary Sagaya has a clumsy side to him, and when he accidentally bumps into Haruna he feels guilty that the boy is fired. Taking the boy in is the least he can do, but his feelings for his adorable houseguest are getting more complicated by the second...

6. I Am Loved
When his teacher/lover breaks up with him and gets transferred to another school, Takase doesn't give up, and secretly transfers too. Handsome student Tanoue is interested in Takase, but will he be able to capture Takase's heart away from sensei?

From Attractive Fascinante:

Shijima Rui, a potter, and Ubukata Toriko, a cram school teacher, finally got to live together. Just like any newly-wed couple, because of their different backgrounds and lifestyles, they had to learn how to accommodate each other. Learning how to take care of a baby and getting their families' recognition were also the challenges they needed to face. But how would Shijima going to prove his love for Toriko when they met with a new love rival?

Included stories: Ore x Yome: Himekawa is 26 years old and has a beautiful girlfriend who wants to remain a virgin until she's married. He's lied to her and told her that he has a career with a company when in fact he works at the local convenience store. Ashamed, and wishing to power up his career so he has a shot at actually marrying his girlfriend (and her virginity), Himekawa replies to a want ad and is surprised to get an immediate response. Gyakushu no Ore x Yome: Kou's very good with computer science and robotics, but not very skilled with the opposite sex. He has a crush on his coworker, Moe, but he hardly even speaks to her. Then one day, his 99 year old self from the future sends him back a present; an android of Moe that only wants to make him happy. His future self comes along for the ride, in the form of a little phallic robot. His new penis-bot and android girlfriend are definitely going to make his life a lot more complicated.

1-5) Ore no Tenshi wa Mayonaka Akuma
This is about a teacher, Fujiki Tomo, whose class has a new student who is as cute as an angel: Shiina Kazunari. But whenever Fujiki sees something unbelievably cute, he can't help but have an incredibly fierce and scary expression on his face due to nervousness. This scared Shiina a lot... and just when Fujiki is trying hard to fix his problem, a second "Shiina Kazunari" appeared in front of him at night. He stole a kiss from Fujiki, and said, "I fell in love with sensei today, and couldn't help but come and see you." The smiling person in front of him, wasn't the angelic Shiina, but a seductive young demon!

6) My Angel is a Demon

7) Please Lock the Door

8) Homura
When his mother dies Tatsuru moves in with his father and half brother Kotetsu. Tatsuru is faced with Kotetsu's constant abuse, but can't stop himself from being drawn in by Kotetsu's fiery eyes.

From Esthétique:: Whatever happened to Rui”s side of the story? When Hana Yori Dango ended, Rui never resolved his feelings for Makino Tsukushi. Now, it appears that Doumyouji and Makino are getting closer to solidifying their relationship. Can Rui bear to give up on the girl he loves? Or will he voices he tell Makino of his love and try to steal her away? Time is running out…

1-3) Love is in the air for another Kunisaki brother as the school carnival approaches. Rehearsals have begun, and Satsuki is hungry. Jumping out of the window may be one way to get away, but his ever-vigilant watchdog, Kunisaki Yamaji, is soon there to bring him back. As rehearsals for the school carnival continue, someone seems to be out to sabotage the play and Satsuki. Can Yamaji protect his precious Satsuki? Does Satsuki really need protecting?

4) A one-shot that follows lovers Ginka and Kakei-senpai. Ginka and Kakei-senpai are both looking forward to their planned overnight trip during Golden Week, but Kakei-senpai doesn't show up. No phone call, no message... Kakei-senpai is gone. What happened? What is Ginka supposed to do? Has this little uke been abandoned?

5-6) Mikami Yuusuke seems to be quite the gentleman, using his wealth and power to take care of many unfortunate men and women. Ichihashi Rui, a student in Mikami's school of design, is one of those unfortunates. Now someone seems to be after Mikami, setting fire to his buildings and leaving "gifts" in Rui's mailbox. Will Mikami be able to save Rui? Or will it be Rui who saves Mikami?

A man comes home one day to have his wife give him divorce papers. A woman comes home to her apartment one day to find a woman she doesn’t know wrapped in a towel coming out of the shower. They both get conned by the same real estate conman on the same house, a 4LDK. So now the man, his two sons, the woman, and her two daughters live in the same house.

From Condensation:

Honda Moe just transferred to Todo Gakuen, but no one bothered telling her she'd be the only girl student! Lucky for her, Himuro Kyo, her childhood playmate, is also in her class. But why's he being such a jerk and pretending he doesn't know her? Moe's gotta be creative and use her wits if she wants to survive the new schoolyear with her virtue intact. Who's gonna protect the lone princess, from a school full of wolves?

A cute and short comedy from the mangaka of Get Love!!! This one-shot volume also includes two extra stories.
• Beware the Full Moon
• Girl's Revolution (also included in Houkago, Kimi to Koi o Shite. anthology)

Valentine Nanka Kowakunai!? a side story included in Get Love!! volume 4