From Divine Sanctuary:
Sapphire was supposed to be a tomboyish junior high school girl who's not interested in boys, but it all changed on her 14th birthday. Not only did she find out that she's prince Sapphire, the Ribbon Knight, but she also has to protect a country called Silver Land!?
Based on the original work by Tezuka Osamu.

From Chibi Manga:

1) Jun'ai Twitter
Reona gets into Twitter. Today, she looks at her beloved Tokuda-senpai again, while Mori-senpai worries as usual...
At that time, her followers increase and... and that, no way, that's Tokuda-senpai!?
And when she thinks she can now get all ...♥ with Tokuda-senpai without any hindrances, Mori-senpai is unusually nice. And Reona, who Mori-senpai is worrying about...!?

2) Onna no ko wa mainichi tatakatteiru

3) Nigai atashi to amai kimi

4) Ashita, Kimi to koi shiteru

From CMX: How far will one man go for love? Find out in SEIMADEN, the tale of Laures, who agreed to become a demon in order to free his one true love Erise from a demon king! Laures became the next Demon King, and Alice was freed — with death. Laures, however, realized that his new inhuman status gave him a rare opportunity: by being the cruelest and best Demon King, he survived long enough to see Alice reincarnated, and then he would effectively be reunited with her. Laures, after living through the centuries, has finally found his beloved reincarnated as Hilda, a dancer who has no memories of her own past or identity. Now he must see if she will accept him as a creature of the underworld…

Losing her parents and being supported by her childhood friend Chikage, Yuiko is living a modest life with her grandfather. But one day, a man with black clothes, white hair, and red eyes that hold a terrifying beauty appears before her. He says..."I've found you. My sacrifice..." Is there a way for Yuiko to resist her unfolding fate?

From SAKURA Chitose Fan Page:
While running to her new school in the morning of her first day, Marimo has an encounter with three guys from her school, that leave her a strange pack. Later on, in her class, the three guys appear again and kidnap her! Marimo is very scared until she realizes that they want the pack again... as it happens, they are the members of one of the school clubs... a club dedicated enterely to Kero-chans and their merchandise! (These are that typical cute Japanese green frog....) Marimo enters the club and starts to fall for the leader, but this, of course, is only the start of the fun....

Oba Tamako tells of her time being at art high school.

Guy teases girl alot while he secretly likes her (or some mess like that)

From TCMANGA:

Just like an ordinary girl, Momoka enjoys her boyfriend's company, eating breakfast together, dating, etc. The only difference is her boyfriend, Hiro, is an upcoming actor in the entertainment industry. Therefore their love life has to be kept in secret. But Hiro's manager wants them to break up in order to not taint Hiro's popularity...

Also includes 2 extra stories.

From Midnight Scans:

Sensei, the person whom I long for, whom I wait for, whom I love, and whom I want to be with. At night, I always think about you, Sensei. You are similar to me, but you have a completely different personality. The moment I fell in love with him, school has become a different kind of place because of him. The love between me and Sensei has begun to grow.

Includes the oneshot, Fake Letter.

God has been dead for some time, and the angels in heaven have decided it is time to find a replacement. Though very reluctant, the angel Rain has been chosen as one of the four candidates in for consideration to become the next god. He and the four other candidates will decend to earth for one year so that they may perform a test to determine their suitability for the position, with the ability to reveal their true identity to one human being of earth. Thus, Natsume Shirou, a very normal high schooler with dreams of becoming a teacher, is chosen by the angel Rain to be the help. As for the test, Rain and Shirou must raise a 'baby', with no thoughts or emotions of its own, into a creature as close to a human as possible

Lovely manga anthology on love and sex, plus a bit of humor for female readers. This book features all the stories of female characters falling love with her senior students. Includes 6 works from 6 authors: 1) "Zakuro no Mi wo Abaite" (Opening Pomegranate Fruit) / Mayu Shinjo : Prideful Kotoko is greatly admired at her school, but will that change when ruthless Takahiro backed by a powerful family sets his eyes on her? 2) "Sexy Shiyouyo!" (Let's Do Sexy!) / Yuuka Kousaka 3) "Jun-ai Egoist" (Pure Love Egoist) / Mio Ayukawa 4) "Netsu-ai Byoutou" (Love Fever Hospital Ward) Yuka Murata 5) "Wagamama na Kuchibiru" (Selfish Lips) / Haruko Kurumatani : Yuu gets a job acting in a commercial with popular idol star Kano Itsuki. When Yuu works up her courage to introduce herself, he kisses her! What does she do but punch him. 6) "Double Face -Akogare no Senpai Hen-" (Double Face -Senior Student Version-" ) / Kai Uchuuda

From In the Water:

Biri Kobouku's gaze always happens upon a figure. For some reason, she can always identify him, even though she's never seen his face. Can someone fall in love with another when they've only seen them from behind?

An anthology of 6 stories. 1. With Those Fingers, Those Lips -- A playboy decides to mend his way? 2. Shakuren/Miraculous Love 3. Toge Made Itoshii (Dear Until The Thorns) -- A sweet story of how a girl found love after her ex cheated on her 4. That's What Makes You A Liar -- What's real and what's not? The heroine learns to stand up for herself. 5. Make Love to Me with That Voice -- Erika loves Takashi but sleeps with Touya who has the same voice 6. Love Idiot -- Strong girl becomes an absolute idiot when she falls in love. Luckily, he realizes it and helps her find herself again.

Glen and Linus are orphans training to fight for a country on the losing side of a war. Glen has a secret that only Linus knows. Will Glen's secret stay hidden? And what exactly is Linus hiding?

Kanbara Rinko is a half-Japanese, half-British girl, so she has blonde hair and blue eyes. However, the vice president of the public moral committee at her school, Kotoshiba, thinks that she dyed her hair and uses contact lenses, so he constantly gives her troubles. And with her attitude, everyone in her class thinks that she’s a delinquent, so she doesn’t have any friends. Her only joy in coming to school is to see Hachiouji-senpai, the gentle and handsome president of the public moral committee. She thinks he’s her ideal prince, but is he really?

The 7th oneshot from Yuri Tengoku Anthology. [From Lililicious]: The yuri in "She, I, and the Red Book" is more subtext than maintext, but it's a nevertheless sweet story about two girls and a book with a startlingly red cover.

Contains 5 stories:

1. Erotic Trigger
High-school student Koyata can't keep his hands off girlfriend Yoshino, who always turns on his "trigger". While she loves him, she still wishes for a little more romance than the clueless and indelicate Koyata provides. Now her birthday is coming up and she's determined to have a romantic evening.

2. Liar Trigger
Lingerie designer Akira is very honest, which is great for his work but terrible for his love life. Assistant Ririko has feelings for Akira, but knows that no woman will be more important than his job. Can she handle being just friends?

3. Mint Trigger
Student Yumi is under alot of pressure and relieves her tension through vices: smoking, drinking, and sex with her prep school teacher Shigemura. Though she loves being with him, they have to keep their relationship secret and can't see each other often. Fellow student Sekiguchi is hanging around though.

4. Vibrating Trigger
A straight-laced student representative gets more than she bargained for when she confiscates a vibrator from an errant classmate! Though she's still trying to figure it out when the owner comes to retrieve it.

5. Summer Trigger
It's summer break and the student representative has nothing to look forward to but studying. A chance meeting with the errant classmate leads to a night of debauchery and fun.

From Rebellious Love:

Four cute stories about young girls' fascinating loves including Sensei, Oshiete Ageru, Virgin Love, and two others.

1.Dakishmete, Honey:
Yanagibu confessed to Sera, and he said she could be his girlfriend... But now he barely even aknowleges her existance?!

2.Sensei, Oshiete:

3.I Love My Husband:

4.Virgin Love:

Ai was just a girl minding her own business when she met him. He was so poor and down on his luck that he couldn't even pay for his own meal. Ai took pity on him and decided to treat him for lunch. What should have been a fairly innocent meeting with him, turns rather strange when she decides to take him home and give him a place to sleep. That should have been all, since he left very early in the morning and nothing unfortunate happened...but is it possible? After how long of a time will she see this beautiful boy again?

Miyu amid the war with awakening Japanese Shinma. (First part: Miyu and the war against Western Shinma)