In the Shitsuji series:

V.1 - Shitsuji wa Daitanfuteki ni Uso o Tsuku (The Butler Boldly Lies)

V.2 - Shitsuji wa Shirokujichuu mo Ai o Sasayaku

V.3 - Shitsuji wa Mondou Muyou de Kuchibiru o Ubau

V.4 - Shitsuji wa Denkousekka de Amaku Dakishimeru

V.5 - Shitsuji wa Yuiitsu Muni no Koi ni Oboreru

V.6 - Shitsuji wa Isshin Furan ni Hada o Motomeru

From Viz:
140 years ago in Kyoto, with the coming of the American "Black Ships," there arose a warrior who, felling men with his bloodstained blade, gained the name Hitokiri, man slayer! His killer blade helped close the turbulent Bakumatsu era and slashed open the progressive age known as Meiji . Then he vanished, and with the flow of years, became legend.
Ten years later, a young woman's life is saved when she happens upon a strange wandering swordsman named Kenshin. The young woman accepts the wanderer into her dojo, despite his secretive past, and the two become fast friends. As their relationship grows, they meet and make more friends (as well as enemies), and they grow accustomed to their life together.
However, one man can only run from his past for so long, and it isn't long before Kenshin is forced to face the life he thought he'd left behind. Now, together with his friends, he must fight the ghosts of his past if he wants the people he loves to have any kind of future.

Contains a side story called Yahiko no Sakabato.

Yukino Shiroi is the new cute girl in class, the kind of girl Kyousuke Kai can only dream about. Yet somehow they wind up going out together. It all seems too easy. But the girl has a secret: she draws the most ecchi manga he's ever seen. It's hard to say what will explode first, his heart, his mind, or something else...

Each of this manga's chapters features a new girl. The first chapter starts out with Ichikawa, who mysteriously has a shounen manga show up on her torso each week, a malady she shares with her male classmate, manga-fan Aoi. The second girl, Kawamura, notices that a boy in her class is suddenly being duplicated!

A princess who holds a piece of a legendary treasure map known as the "Stone of the Sea" willingly joins a famous pirate in order to avoid becoming the twelveth wife of some 72 year old king...

(~from manga-mania)

1) Fudanshi-kun Naughty BL-Like Experience!
Kouhei Arima is a bit of an otaku, in fact he's the fudanshi type! After meeting Kazuomi Shiiba, a closet bisexual hair stylist, Arima finds he starts experiencing the BL scenes he's used to reading about!

2) Obligatory Cross-Dressing for Gakuran Boy
Arima Kanata is male. Cross-dressing is absolutely not his hobby. However because of his feminine face he often gets mistaken for a girl. What to do when Mimasaka Kyougo, home room and PE teacher, suddenly finds something weird in his bag during a surprise inspection while he is dressing up as his twin sister?!

From Girls' Generation Scanlations:
Yuiko is an average high-school girl who just has one wish: for her lips to stop being chapped and become smooth and soft! By a chance encounter, she enlists the help of Sugimoto Mana, the school prince who is one year her junior. Can Mana help Yuiko with her dry and chapped lips and will they also find love in the process?

Note: Featuring the children of a couple from Hidaka's I Hate You More than Anyone (Sekai de Ichiban Daikirai) manga.

From Blissful Sin:

My company senior is gay?! I didn't even want to know that secret. But why was such a delicate and cute person thrown away by another man?! A sweet, heart-throbbing love with a younger seme...
"When Autumn Comes, You Are..."

Ishii-san, the distant beauty I met in a park at lunch break, was concentrating on a book called "How to Make Cakes"?! A report of love born in a park, in a town of offices...
"Toorinuke Dekimasen"

A compilation of commissioned work and Bourbon Nobility...

Kousuke's father was an accomplished chef who died young, leaving behind his son, and leaving his restaurant to his wife of three days, Yuuko. Now, Kousuke has become a chef at his father's restaurant, and he wants to use his father's ultimate French menu in the restaurant...but Yuuko doesn't agree.

From Sura's Place We were all underdogs at one point of our lives. Sad but true but now it is time for some payback ...

From Shoujo Crusade:

[It's okay to be a servant, I want to be by your side...!]
[You'll treat me really really well?]

Mayuri, a girl who wanted to be acknowledged as herself shares the same room with her senpai, Akira who is the student council president and a beautiful person envied by others. But, Akira has a big secret...?
Somehow, her real self is a "boy"!?
Moreover, he makes a petition of wanting to be Mayuri's servant...?

Thus, the wonderful room sharing life of the domineering (!) beautiful girl, Mayuri and a boy wearing girl's clothes who's also a bit of a trickster (?) Akira starts.

Takamiya Satoru's lyrical love comedy.

From MangaHelpers:

Yuta is a normal high school boy living in a normal house with his parents, but his cat turned into a beautiful girl. His parents believe that the cat-turned-girl is a god that will bring great fortune to the family. Yuta has now been forced by his parents to marry his cat. Will Yuta be able to accept the fact that his future wife used to be a cat?

Saku Ooyagi returns to his old town after seven years and becomes reacquainted with a childhood friend, the ever-boisterous Mihoshi Akeno; but the reunion is far from merry since his last piece of memory between them is of her falling off a tree and him diving to save her. Regardless, Mihoshi focuses her all into improving their tattered relationship and forces Saku to join her astronomy club.

Basically this manga is about an astronomy club, and slapstick school life comedy as Mihoshi changes Saku's life.

Sequel to Nozo X Kimi. In their second semester of high school, Nozomi and Kimio are in the same class again, still on their quest to help their schoolmates face their own private true-self. Nozo X Kimi migrated from Shonen Sunday S to the much more popular Weekly Shonen Sunday but, instead of being continued from where the previous serialization ended, a second season was started.

From MangaHelpers:

This is a diary-style 4-koma manga that depicts the daily life and observations of the 40-year -old author, who married a 26-year-old Chinese girl. The author immediately states that this manga-style blog was meant to show the quirky and interesting nature of his young wife. He is an extremely stereotypical "otaku" (Japanese nerd), while she is a Chinese girl enjoying and learning the Japanese culture.

1)The World in Your Hand- Natsuo Kanda's not sure who started the rumors about him being gay, but everyone at his office seems to be talking about it. His only consolation is the escort service he hires every month, and the night of pleasure that follows. This month is different, since his escort is newcomer Masachika. Despite being huge, the childish and puppy-like Chika is exactly what Natsuo needs, and even though it's a business relationship he finds himself growing more attached to the younger man...

2)Our New Year's Event- Actor Keita Otoo has managed to get New Year's Eve off, and plans to spend the night making love to his super cool boyfriend Ryouhei Nemuro. Keita's been so busy lately, they've barely had time to see each other. But with a night of wine and romance planned, what could possibly go wrong?

3)Gaka to Gakyou- Writer Aiji Hirakawa has trouble interacting with others, and so only has one friend, Takafumi Shibata, the son of very wealthy parents. While Aiji struggles, Shibata lives a relaxed life, something that annoys Aiji, even as he tries to suppress his feelings. But when he loses his temper and snaps at Shibata, the drunken Shibata pushes him down and...!

4)My Feelings

5)Beautiful Days

Ageha's older sister is getting married. But Ageha, who suffers from an enormous sister complex won't accept it. One day, in order to get Ageha more involved in the wedding preparations, her sister takes her to Velvet Blue Rose, a shop run by Yukari and Mitsu, a two-man team that design and make wedding dresses. Ageha, who's favorite activity is making exquisite purses for her friends, falls in love with the shop immediately. Will Ageha get over her sister complex and lend her support to the wedding? If Yukari has anything to say about it she will!!

This world is full of weird things. Each of them is a knot. And I am the one who will untie all of them, until I found the "key"- the key can save me from this world.Note: Read left to right

From Winter Translations:

It's love at first sight when the princess of industrial development meets the prince of special advance family! A story about first love that gets your heart puzzled and pounding.

Shuuya Inukai is a model student at a high school who one day attracts the attentions of an ojou-sama, Kantori Isuzu, when she realizes that he is bearing, on his forehead, an X-shaped scar...that was also present on her pet dog's forehead...which leads her believe that Shuuya is actually the reincarnation of the said animal. And now Shuuya's days as Isuzu's pet begin.