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.

In middle school, Ichinose Kimitaka taught his friends how to play basketball. Despite his experience with the sport, his friends quickly outmatched him in skill. After an incident brought on by his frustration and jealousy, he was crushed to overhear those same 'friends' discussing how they wished he'd just kill himself.

On his way to toss out his special basketball shoes, he met a girl who was just as frustrated, throwing her own dancing shoes away. She was so tall, and her hands and feet are so large, that she had been rejected from her chosen hobby of Spanish dancing. He urged her to give basketball a try, and the two exchanged their shoes instead of throwing them away.

As he enters high school, Kimitaka learns that meeting him changed that girl's life for the better, and she is now a happy, social basketball player. Will Kimitaka be able to find the courage to make new friends and pursue his own talents?

Shinozaki Mikoto is a student whose life is really routine. Going to school, going home, going to school, going home... nothing changes... until the day the girl he likes talks to him and introduces him to cycling. His life now has a new meaning, and a bright path has shown itself to Shinozaki. Experiencing both failure and success throughout his training, he works hard to become the best cyclist in the world.

A collection of short stories:

• Boketsu

• Taikutsu na Tsuki

• Johnny kara no Dengon

• Round Girl

• Nade-shiko

• Chinpa

• Jinsei Kaya no Soto (Kari)

Nanase Haruka is a sixth-grade elementary school student who loves connecting with the water and feeling the water as he swims, and he attends a local swim club together with his childhood best friend Tachibana Makoto and Hazuki Nagisa, one year younger than the both of them. Then, one winter’s day as graduation draws near, Matsuoka Rin transfers into Haruka and the others’ school from another swim club. Through swimming, Haruka strengthens his bonds with Makoto and Nagisa, as well as with Rin–at which point Rin, with his passion for the medley relay, suggests they form a team together and enter a tournament.

This is the novel that the anime Free! is based on in manga form at last! (September Scans)

Noboru Takizawa is your normal student. However upon being transferred to a new school the first thing that happens is that he steps on a land mine! From that point on, he fights against the hall monitor and gets past him. In the turmoil of it all, he meets the lovely Yukari and befriends her. Later on, he meets Ibuki, who later becomes his rival to win Yukari's heart.

It turns out that the school Takizawa has transferred to is trying to tyrannize the students of the class he's entered. It is now his job to try and help them out and keep their class! He does this by trying his best in showing the class has potential in a sports festival at the school. Meanwhile in the background, Takizawa's father is setting the teacher's straight and making them stop their evil ways.

The basic plot is that Takizawa transfers to schools where the teachers have messed up methods to deal with students, or schools where there are obscure and crazy rules. His father accompanies him and pretends to be one of the teachers to try and sneak up on the evil or corrupt teachers and end their tyranny.

From MangaHelpers:

Ignacio DaSilva is a world famous Brazilian karate expert turned soccer player who has been making headlines. His giant body and unusual speed has made him the number one player in the world by far. During his post game interview, he stated that there was someone with more talent than him and that he was coming back from Brazil any time soon. This left the media in a frenzy to find who this player was that was better than the great Ignacio.

Kensho is the son of a karate master who grew up with his next door neighbor, Satsuka, who was the daughter of a soccer coach. As fate may have it, Kensho became a great soccer player and moved to Brazil for 3 years while Satsuka stayed in Japan and became the scholastic champion in her division. Kensho comes back to Japan and attends the same high school as Satsuka. Little does the world know about the tornado that was about to hit the soccer community with the return of Kensho. [vyc]

In an attempt to see her dad again, Yuuki and her brother Hiroaki decide to make a championship baseball team (Their dad is a big baseball fan apparently). Iria, the new transfer student (BISHIE ALERT), who is a total oddball has star pitching potential. Yuuki forces him to join her team picking up others as they go along. [This is a joint project (code name "Shoujo Sex Fiends Love Christmas"wink with seven other groups: DGT, ShoujoMagic, MegKF, Shounen Chefs & Ichigo Cooks, Hush, Eden, and Endless Dimension. Each volume comprise of 4 chapters...]

Set in 2002, 3 years after the death of Akagi Shigeru, this sequel to Ten - Tenna Toori no Kaidanji chronicles Hiroyuki's quest to follow the late Akagi's advice and live life freely even if it means complete failure.

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.

Vol. 1
Ohtaka is pissed! University baseball is not what he expected, and it’s all because of Chun, the odd little person who blithely chirps and constantly circles in his tall shadow. Everything Chun does only deepens Ohtaka’s scowl. His irritation skyrockets when Chun demands Ohtaka stay in the baseball club for his sake and steals Ohtaka’s first kiss!

When two people from Chun’s past are thrown in Ohtaka’s face, his agitation suddenly turns territorial—and he’s not sure why…

Will Ohtaka figure out this unfamiliar game that plays for keeps? Get ready for a fast pitch of romantic comedy and surprising love in Tweeting Love Birds!

Vol. 2
Chun is the prize in a game that plays for keeps. The only rule? No hanky-panky until after Chun is won!

News of the competition has traveled back to Chun’s dad, and he wants to know Ohtaka’s intentions toward his son. But Ohtaka hasn’t even told Chun how he feels!

Who will win Chun -- Shiratori or Ohtaka? The tension mounts in TWEETING LOVE BIRDS volume two!

The basketball event that happened that summer...

Nika is a 3rd-year middle-school student with social anxiety. One day she drops her eraser in class, and slacker Akira picks it up. After school, Nika follows Akira to an ice rink in pursuit of her eraser. There, she discovers Akira’s beautiful figure skating and her own love of the ice. Alternatively, Kiwako is a brash young champion ice skater and Akira’s childhood friend. Akira tells Kiwako that one day Nika will become her rival. Which genius ice skater will become The Ice Queen?

In the Maou Lover series:
From Fujoshi Bitches :
V.1 - Maou Lover
“Don’t show that face to anyone else except me”
Mao, the demon-king-like genius pro tennis player, and Hikaru, the S (sadist) and intellectual player, are rivals from when they were juniors!….. It was supposed to be like that but he always looks at me whether it’s during the game or not. Furthermore, suddenly asking me to go out on a date and even French-kiss me…! I can’t stop my heart from beating fast, could this be..... love !?

V.2 - Maou Lover VS Ouji-sama
“You’re not so honest, huh. Even though your body is “honest” like this ❤
”Mao is the devil-king-like genius who hates to lose. His childhood friend as well as his rival in tennis is Hikaru, an intellectual noble-like and a S (sadist) type! Their relationship is like cat and dog because of their opposite personalities. However, they became lovers because Hikaru found out the weak points on Mao’s body. But then, the night at the summer training camp, just when Hikaru was about to attacking Mao but he suddenly stopped... Because i’m the king so just come and do me ❤ I will never say it!!

Follow Ryuu as he plays mahjong with gangsters, crooks, and all sorts of dangerous people.