From Royal Alliance:

Sensei, please teach me about love.
Senou Miku is a normal high-school girl. On the day that she had her first boyfriend, her mother had a job transfer. And then, her guardian, who came to live with her, turned out to be her homeroom teacher, Nishizono-sensei...

A cute oneshot about a gyaru chasing her high-school classmate.

From Shoujo Crusade:

1. Otona no Shoumei
Tsubaki always appears experienced, but actually, she has never had a boyfriend even though she's already 16, and she's a real baby. She wants to quickly increase her love experiences, and become an adult! One day, she got called out by her math teacher, Shiina-sensei, and she was told that she'll have to take supplementary lessons. All alone in the math room with her sensei after school, Tsubaki's heart beat like crazy when she saw Shiina-sensei's facial expressions that were different from usual...?

2. The Imprisoned Princess
My hard work's finally been paid off! All that studying have invited me to "ouji-sama's" house! I couldn't be more happier! But wait, why do I have to clean his house?!

3. The Prince's Mantle
Continuation of the second story. Ouji-sama and I are now a couple! Many may admire me, but he is indeed not a 'real' ouji. I still love him though...

4. The Upside Down Message
I have always loved my childhood friend. Every valentines day, I send him "chocolate messages". But, he has a harem of girls? Without thinking, I told him I like senpai, but the one I really love is him...

After a mishap with their identification paperwork, two fraternal twin brothers, each living in the north and south of China respectively, are forced to switch homes, schools, and lives! Will the two of them be able to cope?

Official Translation

Toko is a third-year high-school student who's been active in the ping pong club. One day, the teacher she likes, Katakura-sensei, quit being the ping pong club advisor and went to head the history club. Going to check out the people who 'stole' her precious teacher, Toko finds herself applying to join the history club! The three other members, Ren, Maria, and Naho, might be suspicious of her intentions, but at least she'll be near Katakura-sensei once again!

In the Kokoro series:

Vol.1 - Otokogokoro (A Man's Heart)

1 & 2. Otokogokoro & Otonagokoro
Salary man Saki almost makes it home but passes out from fever just as college student Shinomiya passes by. When Saki comes to he realizes he's in a strange apartment and Shinomiya has been taking care of him for the past two days! Not wanting to be indebted, Saki tries to repay him as thanks but Shinomiya's having nothing of it. Luckily, Saki's pretty creative when coming up with a way to express his gratitude that has them both wanting more...

3-4. Kiss Kiss Kiss

5. Nibukoi (Dull Love)

6. Hiiragi-senpai no Koi no Ohanashi

7. W Pure

Vol.2 - Koibitogokoro (Heart of Lover)

Vol.3 - Koigokoro (Heart of Love)

Vol.4 - Tokimekigokoro (Heart of Excitement)

The number of chapters comprising the main story in each book is as follows:
Otokogokoro (2 chapters),
Koibitogokoro (6 chapters + omake) entire book,
Koigokoro (2 chapters + omake), and
Tokimekigokoro (5 chapters + extras) entire book.

Average, everyday Japanese gameaholic gets sucked into an alternate world where he has summoner powers and life keeps turning out to be like one big video game.

From Intercross:

The moment that Rio opens a book that she found by chance, she gets sucked into another world. There she meets a guy that she sees in her dream every night. His name is Tsukishiro. He's a magician who controls the story world, and his mission is to take a "princess" from the outside world there. He asks Rio to be act as the princess and complete the tale "Cinderella", however...

Also contains:
- Burning Heat On My Lips (Kuchibiru ni Tomoru Netsu)
Weak bodied Naruse Momo gets entangled with the reknowned playboy, Toomine Hazuki, at the infirmary.

- In Love with the Wolf (Ouji Tokidoki Ookami)
The theater club will be remaking "Little Red Riding Hood" for the school festival and Enomoto Aria is in charge of the script...

- What Resounds in My Heart Is Your Sound (Mune ni Hibiku wa Kimi no Oto)
That boy keeps playing the song she hates and he won't stop playing it until she can remember the title.

A lighthearted comedy involving elementary school kids.

From Loyal Kiss:

Bishie boy that got transferred and visited Ohn Noori, Lee Sun-Uh. I was surely suprised that my father, who I never met myself, had sent him, but to say he's one of my fiancé candidates!

AND WHAT?
My father is the king of a secret kingdom?
Oh my~ ♥
Then I... am a princess?

With two fiancé candidates, I ended up with a happy headache...
Ahhhh~ ♥
Who should I pick to make the right choice?

Yaida Masaki is a part timer, working as a janitor in a large publishing company. His hobbies include fantasizing about other girls, masturbating, and creating cosplay outfits for his fantasy girl: Oikawa Maiko. She is the daughter of the company president, and a far away existance for Yaida.

Recently, Maiko has awoken to her magical powers that were asleep inside of her, but she has trouble controlling them. More often than not, she ends up completely naked and either unconscious or unable to move. Maiko's mother has assigned Yaida to be her guardian and mentor to train Maiko to be able to control her powers. Will Yaido be able to train her to control her powers and become a proper magical girl?

Follow the adventures of Nankyoku Sakura, who seems to be obsessed with anime and manga. She started her first day at school wearing a school swimsuit, cat ears, and a maid tiara and called it her “pajamas.” She’s also insanely rich, apparently.

Continuation of the adventures of Nankyoku Sakura, who is also known as penguin by her friends. She is obsessed with anime and manga, for example she goes to school wearing a school swimsuit, cat ears, and a maid tiara and calls it her “casual clothes”! She’s also insanely rich.Prequel:> Penguin Musume(http://mangapark.com/search?q=penguin-musume)

N/A

An over-the-top, vulgar, grotesque and yet hilarious gag manga about a cute little girl in hell.

Sora-iro no Hibiki is a spin-off series of Papa no iukoto wo Kikinasai!. This particular series is a prequel, starting about one year before the regular series, that tells the story of the Elder sister, Sora, and her new life as a junior high freshman.

The Kingdom of Commons is a continent located in North Arcadia. Mitia Commons is the princess of the kingdom, and she is so extremely shy that she has barely ever ventured outside of the castle.
Now, out of the blur, her mother, the queen, declares that she must go through a ritual in order to become qualified for the throne. The ritual requires that Mitia to collect four powerful stones to complete a magical staff. By doing so, she will overcome her extreme shyness. She embarks on an adventure with her friend and bodyguard, Atty and Sasha, in order to search for these four stones.

Fudou Jun (Devilman Lady) heads to St. Chapel School in order to track down a Devil Beast.