Comedy (1721)

A collection of high school love stories, each chapter featuring a different student. For example, Hiro has a crush on a cute upperclassman girl, but she has rejected his advances 15 times! Will Hiro be able to find a way into her heart? His friend Akechi keeps a notebook of information on all the girls at school, but when he goes after the secrets of an incredibly quiet and shy girl, will his interest become more than professional curiosity?

(Source: MangaHelpers)

Each chapter focuses on a different character, although they are all related through being classmates.

The male lead has gynophobia due to a traumatic experience. Under his sister, who is a nun with little brother-complex, recommendation, he entered a previously all-female school that now has 9:1 female to male ratio. This is a story of that man with the Queen of the school, who has demanded him to work for her as her secretary.

As 2006 settled in, Earth had been rendered completely devoid of Transformers, and the rebuilding of Tokyo was underway. However, Galvatron's impact was revealed to have had a much greater effect than anyone could have predicted—the blast caused by his impact had scattered his Unicron-empowered cells throughout the planet's atmosphere. When they came into contact with other animals and objects, from marine life to cars, they fused with them, becoming one of many monstrous creatures referred to as Legion. This catastrophe also created the means to defend the world against the Legion, however—when Galvatron's cells came into contact with human beings, they also become able to fuse with other entities containing his cells by kissing them. With their Autroopers being the perfect candidates for this "ParasiTech" fusion process, the EDC began recruiting and training these "Kiss Players" as combat squads to battle the Legion.

(Source: Transformers wiki)

NEETs are usually people who have chosen not to be part of society due to personal problems or just straight out laziness... This story centers on a certain special girl that would have become a NEET right after high school without even realizing it. It's not that she doesn't want to get any job, but it seems that there is not a job out there that can fulfill her very special job criteria... At least her mother understands her.

The first fan creation to receive official recognition within the Vocaloid world, Hachune Miku is the small and spirited spin-off character of the famous Hatsune Miku. Equally recognizable by her long pigtails and affiliation with leeks, Hachune Miku and her friends go on their own adventures in this full-color collection of comedic shorts.

(Source: Seven Seas Entertainment)

A mysterious organization is interested in fledging duelist Shobu Kirifuda's ability to bring Duel Master creatures to life. With the support of his friends, Shobu duels with passion, discipline, and heart as he strives to be like his father and become the next Kaijudo master.

The story centers around the card game Duel Masters, which revolves around five civilizations (Fire, Water, Light, Darkness, Nature).

How I Became a Pokémon Card is a manga series consisting of six volumes. Each volume features vignettes involving Pokémon like Jolteon and Dratini. A special Pokémon card is included with each book. It is drawn by Kagemaru Himeno, who is also an artist for the TCG.
(Source: Bulbapedia)

You know and love Stitch's Hawaiian adventures... so join your favorite alien as he visits a Japanese island near Okinawa, where he befriends a young girl named Yuna who excels at karate. Come along as Yuna and Stitch go fishing, enter a costume contest, and even attempt to bake a cake. You never know what sticky situations they'll find themselves in next!

(Source: Tokyopop)

Nanami transfers to St. Marivel (Mary Bell) High School from America as she looks for her childhood friend, Kotaro. In a school where the ratio of male students to female students is 1:20 respectively, Nanami gets involved in a conflict with a male student who is almost twice her size. As Nanami was about to engage in battle, she catches a glimpse of Kotaro and stops, allowing the male student to grab hold of her! How will she get out of this situation?
(Source: Mamo)

Shouta Yamakawa is an otaku who spends most of his time reading manga. He claims that the only way he would fall in love with a woman is if she were 2D. So one day, while absorbed in his favorite manga, he has a passing thought wishing for his beloved comic heroine, Sora Nagihara, to come to life. To his surprise, she pops right out of the book!

Unfortunately for Shouta, all does not appear as it seems. Presented as frail and endearing in the manga, Sora now introduces herself as an aggressive goudere—a girl who will let nothing and no one stand in the way of pleasing her beloved. Further, Sora believes the world is an erotic game that she must help Shouta conquer! How will Shouta cope with becoming the master of such a chaotic girl?

[Written by Animeranku Rewrite]
This series is on hiatus.

The carefree Toshiya Sakazaki inventor works in the company Kamata, engaged in the production of armaments. Divorced from Chisato Arita, who also works in the same company, Toshiya races against her to see who builds the better war robot.

Sakazaki creates a robot combat with artificial intelligence named Sayuri. She is shaped like a teenager and all that does is arouse the jealousy of Chisato. Although it has at its disposal a wide range of devastating attacks, Toshiya's error was introduced programs jokes forgetting the main program, the struggle, as Sayuri is not considered a weapon and Chisato advised to go to an institute high school to learn to improve its AI.

The problems come when the company KKK (Kurahashi Kogyo Company of Kabushikigaisha = the company of the cap), a competitor of Kamata, try to destroy Sayuri. This infiltrate a spy, Misaki Hoshino, traps tend to Sayuri. And from there everything gets out of hand... because many parodies of anime, manga and japanese tv shows are just around the corner.

The lead character, Jimmy (Katsuya Oonishi) is an art student at Bara-Gaku ('Bara Juuji Gakuin'; Rose-Cross Academy). When he was little, he almost drowned, but was saved by a tattoo artist. From that day, Jimmy vowed to become a tattoo artist (because tattoos signify 'a hero' to him).

Jimmy's a decent person by nature, but because of the people he hangs out with, he's considered a delinquent. Banko, his partner-in-crime, is a shrewed kid; he sells information on the popular girls (phone numbers, likes and dislikes, etc) in the area. Despite the delinquent exterior, Banko is actually really smart and has broad general knowledge.

As the story progresses, Jimmy and Banko meet new people and they form a gang of their own; along the way they bump heads with other gangs from other schools/districts. This manga is not the typical high school-slice-of-life story; it's got a rougher edge! This manga depicts some high school delinquents trying to get through high school life and gang fights.

(Source: Mangahelpers)
Included one-shot:
Volume 17: Smile (with Nagata Kouichi)

An almost road accident victim loses his memory after being pushed to a street power line pole to save his life. Not knowing his identity he is compelled to stay at his savior's residence, a gym and boarding house for female wrestlers, until he remembers. During his stay he becomes his savior's manservant and the gym's referee trainee.

(Source: MU)
Included one-shot:
Volume 4: Sebangou wa O (The Number On My Back is O)

Utsuru Sanada is a professional photographer at the age of 17, he can guess the exact 3 sizes of any girl, he can memorize anything he sees, and he can counterattack karate moves (Most guys would want these abilities). Why? Because he has superb photographic memory called “Shutter Eye” (Shutter as in the shutter of a camera). He meets Niko Kurihara, the female protagonist, who dislikes men, is a master of martial arts, and is of course beautiful. Utsuru attempts to prove to Niko that he is not the guy she thinks he so he can take a picture of her.

(Source: MangaHelpers)

Izumo Kunisaki, a descendant of Izumo no Okuni, is often mistaken as a girl. It is the bane of his existence. His father and best-friend (i.e. the girl he likes) often laugh about it. To top it off, he plays the girl roles in his family's Kabuki troupe. In this short, he discovers that that curse is also his greatest source strength and will prove just how much of a man he is.

(Source: MU)

In exchange for being the only one who knows his secret, Yuna is tasked to hang out with the quirky student council president...who has a habit of separating from his body and following Yuna around as his soul?!
(Source: Shoujo Crusade)

One bright fall day, young Takisawa Noboru transfered to over to Honjakuniku High, arriving an hour after the start of classes as the principal instructed him. Everything seemd to be going fine, until the mildly overzealous hall monitor Jonichi Koichi decides to charge him with tardiness, and administer punishment...see in THIS high school, any argument can be won through sports or combat, leaving Takisawa in a bit of a pinch until the lovely Yukari steps in and saves him from making himself even later than he is. But that's just the start of Takisawa's troubles...the school tough, Ibuki Saburo, has set his sights on both mashing the new meat to a pulp, and winning the hand of Yukari away from any potential suitors...in the boxing ring! Will Takisawa be able to defeat Ibuki, win the love of Yukari, and still make it to Calculus on time? Of course, it's all in a day's work for a Blazing Transfer Student!

(Source: AniDB)