Hero and Mii are two newlywed six year olds. And that's only the beginning!

This pair of daughter-in-law and mother-in-law is far from ordinary!
War is not the tragedy of the human race.
The tragedy of all mankind is the impossibility of choosing one's parents and children.
Life partners can be chosen. Not in-laws.

But rest assured, the greatest tragedy of the human race is actually entertaining! Main Street in Elysium makes an amusing satire of our pains.

The on-going mortal combat between Noriko and her mother-in-law who take up residence on Main Street. The wacky neighbors who bring their own craziness to the set. This hairy combination creates the dark world of Elysium. Beware: it's addictive.

A high-school kid who’s a total loser throws up a lot. That’s about it. 25% of the manga is Juichi (the title is a pun on his name) throwing up or sneezing in full page spreads. It’s total madness.

From MangaHelpers:
Being one of the few longtime friends with Onizuka (GTO), Danma Ryuji has seen all the fiascoes he has gotten into. But the motorcycle shop owner and self proclaimed fastest driver in the city is about to get into a world of trouble. A hot teenager named Ishikawa Mimon starts taking interest in Ryuji, but contrary to her appearance, she's a dangerous person that will put Ryuji into life threatening situations. Even though he has a beautiful girlfriend named Nagisa, Mimon is about to wreak havoc in Ryuji’s peaceful life.

After being betrayed by his country, Jirou left his past as a hitman behind and came back to Japan where nothing mattered anymore in his eyes. But that's before he meets Nami, an active hitman seeking vengeance for her father's death. But not any hitman, a wallman! Jirou is then brought back into this world and teams up with her.

From Girls' Generation Scanlations:

Enter Weiter Andreon, a young witch with special abilities to communicate with fairies. That day, saddened by her parent’s death, Weiter wanders into her back garden where she finds a wounded young man. Weiter decides to take this young man under her wing despite meeting objections from everyone else but her uncle's friends. In the magical lands of Alma, where Gurens are worshiped as guardians and protectors, Weiter finds herself beginning a new adventure with this mysterious young man who appears to be more than what he seems.

From Hwang Mi Ri's Palace:

After losing her entire family to a mysterious fire, Soon-Doong refuses to wallow in sadness and decides to move to South Korea from her native Yanbian to find herself a new and better life. Holding nothing but a plane ticket to Korea, a small package of clothes, and a half-burnt letter between her grandfather and a "textile factory owner" in Seoul (who were good friends), she resolves to find a job at the factory and make a decent, honest living. Only, the "textile factory owner" just happens to be the CEO of the biggest clothing brand in the country, and her grandfather wasn't just a good friend with the "textile factory owner" - he had saved the CEO's life and lent him the money to start the business that he has today! And so begins Soon-Doong's life in Korea, as she shatters everyone's bigoted prejudice against ethnic Koreans who came from Yanbian and makes everyone rethink about their own values and lifestyles.

This webtoon describes the not the nice Oppa you see in dramas or movies. This is the real brother-sister relationship. The real Oppa is here!”

Collection of erotic short stories:

1-2) Ino and Takaya are schoolmates and childhood friends. Ino has a weak spot - a mole on his cheek. What will happen when Takaya takes advantage of it?

3) The story about Masaki and Haru, who share a room in dorms. They're secretly dating. Will they have a chance to spend some time together after the end of exams?

4) The story of perfect couple - Junji and Misaki. They're completely head over heels for each other. Is it possible that jealousy will destroy their extremely intense relationship?

5) Chihaya is a kind and gentle lover, but Jun dreams about his partner going wild. He asks his friend for help. Will this bring him happiness?

6) Tanigawa sensei teaches his pupil Sano-kun how to relieve stress. What's gonna happen when he lends the boy a "helping hand"?

7) Short story about Jun and Ryo who had become lovers before they became brothers through their parents' marriage

8) Extra story to 1-2). Takaya buys some naughty toys...

Kiyosumi thought that Ayabe had been rejected by a boy, but really Ayabe was just waiting to confess to Kiyosumi.

A boy loses his parents in a supernatural disaster known as a "Curse" and is then adopted by the Tsuchimikado family; a family that exorcises curses. Ten years later and the boy has become the head of the family and now goes about exorcising curses all the while trying to balance his job as an exorcist and his life as a student in high school.

"Abnormal" is about people that live in a world that can only be seen by those who live on it, but what happens on this world will save or destroy the future of humanity. A slavery-addicted girl named Seimina Yuri find out that she is an Abnormal and starts to fight in this world for her own survival, until she discovers that the world will need a new god.

An extraordinary luxurious, legendary school that evokes envy! A complicated student life will now unfold! Finishing her studies abroad in England, Cai Ying and good friend Gong Liang Hui are traveling on Eli Academy's ocean liner to return to school. At the pier, as they are preparing to board the ship, they run into a mysterious pretty boy who is being pursued...?

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?!