From Shoujo Crusade:
Koasa is training to be an Okami (receptionist) at her family's onsen (hot spring). One day she'll take over, but until then, can she deal with troublesome clients, and most importantly...love?

From SugarManga:
Shinpei is 8 years older than Hikaru and due to her Grandfather's health they got married but does Shinpei really love her or is it just fatherly love?

From Nagareboshi Manga:
Ogawa is a total pushover. So much that she's been voted the "most apologetic" and "most bossed around" girl in the school! So what happens when she gets dared to kick the "Three Feared Saitou" - the infamous boys who have bad reputations - behind the knees? They end up teaming up with her of course! The Saitous decide to protect pathetic Ogawa from being bullied--hilarity ensues!

From Chibi Manga:
Three guys, One girl. A share house with handsome guys, falling in love with the cooking story will begin...!!

A boy who is prettier than a girl. Don’t destroy me with your gorgeous face.

"Is our relationship really going to stay the same forever...?"
"Or everything we experience be just memories?"
"How will everything come into a conclusion?"
Together, they experience life,
laughter, heart-warming romance, action and drama...
The life they experience together now begins.

From CPM:
When love comes to town, the lives of four socially maladapted teens are turned upside down when rotating attractions, comedic misunderstandings, and general chaos forces them to reconsider everything they've ever known about relationships, trust, and the frailties of the human heart. Fortunately, none of them knew very much in the first place.

Hatori Ejima has a beautiful face and is the idol of his school. But has a weakness: a phobia to all girls due to childhood trauma. To cure him, his sister, Saiko forces him to cross-dress and join her idol fans club. Saiko is the leader of Miya Fans Club of the famous duo, RUSH. Hatori, who can't stand being near more than 2 girls, must now face 200 fan girls at once! Not to mention, the idol Miyato from RUSH seems to have fallen for his female identity!

1) Nude
Natsuki is getting ready to graduate, and she wants her final art project to be Tsuji, fellow art student and crush of three years. Will she be able to complete it?

2) Hold me in the Summer
Nagisa's summer vacation seems like it will be uneventful, except she keeps running into the handsome Yuuji. Can this be a summer romance, or maybe something more?

3) Christmas Passion
Miyako is constantly being sexually harassed by Atsushi. He interrupts when she's being confessed to and is always touching her. But Miyako can't forgive him for hurting her years before.

4) Red Hot Blizzard
Kazuno's sister drags her along on a skiing retreat. Her sister's boyfriend also brings his brother, Aoi. The two get closer through mishaps, but is this meeting more than a coincidence?

5) Valentine Ecstasy
Madoka has been having sexy dreams of Akashi, probably because he's always teasing her! He has so many girls around him, she won't even give him obligatory chocolate. Can Akashi change her mind?

A series of oneshots in which a certain brand of konpeitou allows the protagonist(s) to travel back in time.

In Omoide Konpeitou, a track team star meets her role model—the brother she never had a chance to meet.

In Takeover Zone, a beautiful girl confronts her former self after being dumped by her boyfriend.

In Samazama no Koto Omoi Dasu..., a saxophone prodigy wakes up to find a teenage-version of an old man she knows and plays with his band.

In Punk Rock Mother Goose, a girl and her childhood friend bump into her mother that left her to perform in her band.

A high school girl is in love with her friend, but he already has a girlfriend. She decides to hide her feelings for him and live her life as usual. She gets set up by a friend to attend karaoke where a senpai takes interest in her. How will things turn out for her...?

The 2nd story in Yuri Tengoku Anthology. "Omoi no Kisetsu" is about what happens when two nuns-in-training are discovered to be having a relationship with each other. Type

From Viz:

Miku Yamada has a longtime crush on classmate Kyohei Fujioka. But no matter how many times she tries to show him how she feels, clueless Kyohei just doesn't get it. Frustrated, Miku gives up on him, only to have him start calling her "Cactus" for being prickly when he's around. Will Kyohei ever figure out Cactus's secret?

- Includes other stories:

Okosama Brat
Taishi stays at Rie's house because his parents work overtime. Rie thought that he was actually her real brother! Now, Taishi says that she's "idiotic now and then". People think of Taishi as cool and mature, but Rie knows that he's just a brat inside...

Sono Saki no Sweet
Hidaka Mao was confessed to by her crush Chihiro-kun in junior high, but as soon as they started going out, she became unable to communicate with him. She is still confused about her feelings, but will this year's Valentine's day bring them together again!?

Four hundred years back into the past...

In a countrified corner of merry olde England lives Jacqueline, the daughter of a grand duke. She is infatuated with Raymond, a beautiful youth in a certain theatre troupe.

Full of turbulent adventures, the fascinating tale of a tomboy-princess who dreams of love!

In order to protect the world from Monsters, magic users form contracts with each other through a magical lamp known as the "Lamp of Torn Flames" to increase their powers. Corze Letta is one of the newest candidates from the race called 'Halves', ready to find her partner of the Lamp, a person from the race known as 'Genies'. However, Rau Laaran, the Genie Corze finds herself paired with, seems to be a lot more difficult than she expected...

From Omari's Sister:

"It is the Taisho Era at a certain girl's school. There one young lady embodies the ambition and is the envy of every girl. The crimson ribbon adorning her marks her as the top student. She is none other than Yoshimura Sayaka. Always at her side is the chauffeur her family employs, Narutaki Shinobu. Are the two in love as rumored amongst the female student body!?"

Note: Untranslated one-shot from the first volume—"Ruka to Touzoku (Ruka and the Thief)"

From Perfect Illusions:

Asahi, a girl, falls for Kaoru, a music freak, who happens to be oblivious to girls. At the moment, he has his heart set on buying his dream guitar but isn't old enough to hold a stable job. Asahi agrees to help him buy this guitar because she wants to get closer to him and give him the chance to get to know her. Will he be able to break his sole love for guitar and give Asahi the chance?

A classic manga about girls at a private all-girls school. The storyline centers around the experiences of Nanako, a "normal" girl who is invited to join the prestigious school organization, the Sorority, and is resented by all the other students because she doesn't appear to be qualified. Other key characters are Nanako's two friends: Tomoko, her friend since childhood who is alienated by Nanako's decision to try to join the Sorority, and Mariko, a strange, obsessive girl who is invited to join the Sorority along with Nanako; her "older brother," Henmi, who she corresponds with by mail; and the "Three Magnificent Ones," all of whom are admired and quasi-worshipped by the rest of the student body: the head of the Sorority, Miya-sama, the haunted, pill-popping rebel, Saint Juste, and the star athlete with a mysterious disease who doesn't like the Sorority, Kaoru-no-kimi.

Contains an unscanlated oneshot in volume 3: Early Spring Trembling.

Onee-san no Jijou (Sister's Situation) is about a 16-year old high schooler named Tsukiko. She has a crush on a guy in her class, who is also a popular rookie soccer player named Kou. The thing is, her mom just got remarried... to Kou's father, making Tsukiko and Kou step-siblings.