From Intercross:

1-3) Koakuma Lion
Uno and Reo are neighboring childhood friends. One day, a friend tells Reo that he should become a model. Now, they are high school students, and Reo has become an extremely popular model... yet he acts like a spoiled child around Uno!

4) Renai@Home
Ren and Ai are childhood friends as well as neighbors. Will their relationship change when a young girl claiming that she's from the future show up begins calling them Papa and Mama?

5) LIFE+B
Sonoda Mio has always been such a tomboy at school but when at home, she works in her family's flower shop. Her family's VERY GIRLY flower shop. Mio doesn't want anyone at school to see her all girly, so when someone walks in, wearing the school uniform, she goes and hunts him down the next day. But when she tells him not to tell anyone, he....!!?!

[From scanlator site]
Five years ago, Chika received flower seeds from a “mysterious” boy, who asked her to grow them until they bloom. Five years later, the flowers have not bloomed yet, but another boy has come in front of Chika, and claimed himself as the “mysterious” boy. Is he really the boy in Chika’s memory? And will Chika be able to grow the seeds?

There is a Legend about a guy named Kang Do-Young. He is perfect, he is great at sports, he is rich as well as good at fighting. That guy is also the current Jjang of the school. And now that guy likes Namire. A girl who is in a club called 'Pink Lady' and that also wants to be Jjang of her whole school. But she wants to fight Do-Young and defeat him so she can be the new Jjang. To bad Kang Do-Young doesn't want to fight since he likes her. What will happen will she ever defeat him and become Jjang or..........?

From Forbidden Garden:
Chaos and mayhem is afflicting Yoshida Akari's school. There is a ruthless bloomer thief on the loose-and no one is safe!
But on a more serious note, Yoshida Akari's best friend, Hayakawa Maiko has been missing for 3 days now, and it seems as though no one is making any head in the investigation. So, Akari decides to take things in her own hands and questions the last person who was with her best friend, Student Council President Morishita Natsu. He quickly gives her the brush off stating that he is too busy with the bloomer incident.
Who is this mystery thief and just what exactly has happened to Maiko?

1) Atelier
Art student Ritsu takes on Tagami, a teacher with a bad attitude.

2) Mad Dog Breeder
Kusugawa wants to discover what his coworker Oka means when he says he get "desperate" when he drinks.

3) Longing for the House Guest
Haruka and Jun are roommates and novelists. After Jun's sloppy housekeeping causes Haruka to injure his hands, guilty Jun needs to help Haruka any way he can.

4) White Snow, Black Wings
Ex-prostitute Mizuki and mafia assassin Katsuhiko are on the run from their former bosses, but Katsuhiko is sick.

5) Milk
A young man has a guy who wanders in and out of his life like a cat.

6) Twilight Amusement Park
Teacher is dating his student, Yoshii, who wants to quit school and work in an amusement park, but Yoshii's family wants him to study abroad.

7) Haruhi
His young patient dying of a mysterious illness, a doctor takes him on a trip to the sea.

A lonely lion falls in love with a kind human girl and asks a witch to grant his wish to become human. But, will the lion lose everything, or find true love?

Travel into Japan's nuttiest apartment house and meet its volatile inhabitants: Kyoko, the beautiful and mysterious new apartment manager; Yusaku, the exam-addled college student; Mrs. Ichinose, the drunken gossip; Kentaro, her bratty son; Akemi, the boozy bar hostess; and the mooching and peeping Mr. Yotsuya.

From ShoujoMagic:

A low-price, high-quality apartment in the metropolitan area of Tokyo is nothing short of a miracle! It exists, but there's a catch -- tenants must be good-looking and pass an interview by the landlord!? This is a love comedy about what happens when the beautiful people are all gathered under one roof!

Maico is a charming young woman who also happens to be an android. Her creator built her to revitalize the flagging ratings for her radio station, as well as to probe the intricacies and weaknesses of the male libido. Maico quickly becomes entangled in a very human love triangle, not to mention the scandal and intrigue surrounding the station, its competitors, and the hordes of adoring fans that this sexy new personality attracts.

The first three stories are about 3 brothers. 1) The eldest brother, Shunpei, picks up a prostitute boy in order to refuse an arranged marriage by his grandfather 2) No One But You The middle brother, Takashi, makes his old temporary lover enter his father's company 3) Body Guard The youngest brother, Tomoaki, loves his manservant. The other three stories are unrelated : 4) Bluish Spring The professor who invented the medicine of "rejuvenation" tells his student of his feelings 5) Sea Turtle Ping Pong Tale Romance in the high school ping-pong club. 6) Family A homosexual couple with a kid looks back over the past of their youth. Additional story (extra from the first 3 stories) : The Suffering of Kirishima's Chairman ~ Pgs. 25-31 New year's family reunion, from the grandfather's point of view.

From Aerandria Scans:
In this grim and realistic take on classic fairy tales, Prince Ludwig, a female corpse collector, is ordered by his father to find himself a wife more suitable than the women he often brings into the castle. Along with his servant Wilhelm, they travel across the land in search of fair maidens from classic stories in hopes of finding Ludwig a wife.

High school delinquent Mura must put up with the annoying presence of new stepbrother Subaru when his mother goes away on honeymoon. Dealing with gossip at school is bad enough, but Mura's life is turned upside down by a forbidden locker-room kiss and the publication of an incriminating photo snapped by BL fangirls.

Takaguchi Satosumi's first BL work.

Based on DS Dating Sim "Love Plus"

Based on DS Dating Sim "Love Plus."

From Shoujo Manga Maniac:

The very modern tale of a girl named Yun, with a penchant for picking the wrong guys to fall for...and the bad boy, Hiromichi, who may just be good for her after all!

In the Lovely Lesson series:

Vol.1 - Lovely Lesson
Compared to other girls at your school, do you think you're ugly? No matter what you try, you never become as pretty as them? Or were you dumped because you weren't pretty enough? No matter what the reason, there is a way to heal you. Meet Yuhri, a "beauty healer" who really is just a high school goods storekeeper. But when Yuhri meets another "beauty healer" like her, Makoto, what will she do?

Vol.2 - Chuukyuuhen
The first story is about a girl who is always called fat and ugly by a cute guy. To make him say she is cute, she tries hard to look pretty.

Vol.3 - Hair Make-Up Hen

From Viz:

Risa Koizumi is the tallest girl in class, and the last thing she wants is the humiliation of standing next to Atsushi Otani, the shortest guy. Fate and the whole school have other ideas, and the two find themselves cast as the unwilling stars of a bizarre romantic comedy duo.

Lovely Complex Plus is actually volume 17 with the final chapter called Love Com Final. The first two chapters are about before Koizumi Risa and Otani Atsushi met each other. The third chapter is about their first encounter and a little bit of what happens to them after the ending of Lovely Complex.

*Contains a side story called Hoshi ni Natte mo Aishiteru (Even When I Become A Star, I'll Still Love You) in vol 12:
Reina wakes up surprisingly in her boyfriend's room. But it seems that she passed away three days ago...

In 2004 Lovely Complex received the 49th Shogakukan Manga Award for shōjo.

Kouji's mother has just remarried, and as a result, he has a brand new father and two unbelievably beautiful twin brothers. In order to get to know his new family better, Kouji transfers to the same private school that his newly acquired step-brothers attend. But when Kouji finally meets them, the two have completely opposite personalities! And it seems like one of them is intent on being more than brothers!?!

A girl realizes that real-life isn't always like the love story manhwa she's read...