From MangaHelpers:
At school, Kamazaki Yuu feels as though there is a circle drawn around her, a line that no one will cross. A part of it is because her face looks mean, and another part of it is because she's rather socially awkward, but the largest part of it all is that she has earned a reputation for being really bad-tempered and violent to the people around her.
This all changes in her second year of high school.
The cute, friendly, and popular Kume Asami one day inexplicably crosses that invisible line and decides to be her friend. Kume introduces "Kama-chan" to friendship and to the 5-man futsal club that meets on the school roof. As Kama cautiously enters Kume's club, she may find herself able to grow past the bad expectations people have of her, and enter into a new, happier, high-school life.

Collection of oneshot stories: 1. Is love between adults and high school girls really taboo? Ritsuko's boyfriend, Yuuji, is an outstanding office worker who works in a foreign company. He always treats Ritsuko like a little kid just because he is seven years her senior. Does Yuuji really like me? Ritsuko is always insecure. Do I really like Yuuji? Can we really be together? 2. Taiyou and Daichi are twin brothers, who have been Aya's childhood friends but.... 3.Minori is a shy girl who has a black cat she named Night, whom she loves very much. One day Night runs off. Will she ever find him and bring him home?

In order to become a Strong and Cool girl, the highschool girl Mie Tsukasa joins a professional wrestling organization. Follow her intensive training every day together with her trainer, with the aim of becoming a pro-wrestler.

Third-year high school student Aya, who's secretly afraid of water, manages her high school's swim club. It's her last summer as manager and her final time managing the swim club for the Inter High Meet, but perceptive Takeru figures out her secret.

From Easy Going Scans:

After the sudden death of his wife and child, John Harding spirals into despair. Deprived of his motivation to live, his attempt at suicide is unexpectedly interrupted by the arrival of a friend who wants him to coach the town's Little League team. Can John restore meaning to his life?

A bittersweet and meditative adaptation of the English language novel "The 12th Angel" by Og Mandino.

From Fujoshi Bitches:

After being abandoned by the Goddess of Victory, Hayase Mahiro, the genius racer, was unable to win any more. Right when he was at the end of his rope with financing his team, a suspicious man dressed in a black suit appeared before him. His identity? The owner of a private, exclusive club, to which only the chosen ones have access. Mahiro begun working there and with his inherent, unyielding spirit as his weapon, started climbing up the ladder of this gorgeous world. But...?

Haru Okamoto, a teenage girl who adores katana, is just now entering high school. When she was little, she happened upon a katana in her grandparents' house. In their haste to get the blade from her, they agreed that when she was an adult, the katana would be hers. However, to her dismay, they do not agree that a 15-year-old, immature, excitable Haru is an adult! Luckily, she finds another outlet for her love of Japanese swords, the almost-defunct high school Iaido club! As Haru searches for new club members and tries to get over her fear of boys, she will become aware that her affinity for Japanese swords has a deeper source than she could have imagined!

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From Yaoi Is Life:

Let onto the team, and then quickly sent back to the second string players... An unlucky man. Is Sakagou's season about to open?!

A story about two people with mental problems protecting everything they left with their only method, playing ping pong.

Don’t mess with Ayu – she’s one of the top-ranked Karate club members in the region, although she does have one weakness; snakes. After one fight where she is unconscious because her opponent knows her weakness, and old friend shows up, a young man named Shunpei. He used to be a weakling, but now he may be even stronger than Ayu!

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With the passing of the her grandfather the Eisei Meijin whom she'd spend most of her childhood together, Ayumi lost sight of her goal. On the other side, Erika who's aiming to become a pro at Shogi to pay the dept her father left with them after running away. Right after entering high school the two meet at the on thing they shared in common, the Shogi Club. Find out how their story unfolds as they go through life centered around Shogi!

From MangaHelpers:

Second baseman Kaizu Chiaki is a normal senior high schooler who aims to reach the Koshien with his teammates and worries about his future career. One day, a new teacher arrives at his school. Her name is Takamine Touko. Crossing the boundaries between teacher and student, Chiaki and Touko find themselves gradually attracted to each other. [DrCoke]

Hiromu is untalented in sports and has failed in many teams but has found talent in ping pong.

Natsuhiko Sakurada, having won three billion dollars in lottery transferred to the Millionaire Private School, that catered for the children from wealthy families. This is all for the sake of seeking his childhood friend, Shin, whom he used to play baseball with. This school is managed by a pair of twins, who are the very popular and smart young masters of the Jinnai family.

But, unexpectedly, this school does not have a baseball team and his room-mate, one of the Jinnai's twins, is very distant towards him.

In order to setup a baseball team to find Shin, what would Natsuhiko do?

Find out in this lovely, sweet and hilarious story.

Noritaka Sawamura is a teenager; until this day, everybody has been making fun of him. Now he enters the high school which is an opportunity for him to restart a new life! He loves a girl of his school, but he needs to be a little bit stronger to be recognized by everybody. So he joins the Thai boxing section. His entertainment is very special, due to his master who seems to be a little mad. Noritaka will make you laugh, for sure! Note: My favorite passage is when Sawamura spins through a window with a helmet, his trousers missing, with crap coming out of his ass, and everybody looking at him. He is the most ridiculous man in the world at this moment!

It is the 23rd century, an age of science and technology, where sex is no longer required to reproduce. However, humanity has not forgotten sex! Sex has evolved to become a form of martial arts, and those who practice it are known throughout the world as BattleSexers!

‘Race!On!’ is a high-octane action/racing manga which pulls you into the fantasy land of Oracen, where magic and steam-driven technology co-exist. There are magical creatures, robots, monsters, and crazy people who wear pointy hats. The story follows Lyn – a mechanic who, by a twist of fate, finds himself entering a Magic Race – a dangerous competition where the objective is not only to outrun your opponents, but also to survive whatever explosives, magics and punches they might throw at you. In this crazy competition where anything can happen – you either finish first, or you don’t finish at all.