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Taichi is a fat teenager and a horrible embarrassment to his little sister, Mika. She saves her own image by refusing to acknowledge him in public, but that won't work forever. In order to solve the problem, she enrolls him at a boxing gym, hoping the exercise will make him lose weight. At first, Taichi is very hesitant about the whole idea. Soon, though, his trainer Kurata's tough encouragement makes him feel like he might actually be able to become good at this sort of thing. But while the boxers at the gym accept him as a fattie coming in to jump rope and hit punching bags, will he be able to get them to accept him as a boxer-in-training? And does he have what it takes to become an actual boxer? (Source: MangaHelpers)

Gang Chan, a young man from a rural village, dreams of becoming a boxing champion. He trains relentlessly every day to repay the elders who raised him. One day, men in black suits arrive, threatening the villagers with a shady urban redevelopment project. Gang Chan steps forward to protect them, but the odds are overwhelming. In despair, he breaks down, blaming himself for failing his people—until a mysterious figure appears, changing his fate forever. (Source: Naver, translated)

Umeboshi Kinya lives only for the sole purpose to fight and become stronger. But since he became the king of the baston, nobody dares to be measured. Kinya so bored and depressed... It takes the hair of the beast and heard talk of a potential adversary that it will be a pleasure to go cause! He landed in a boxing hall where it does not happen as it really would have thought... So? Who is the strongest now?!

Two professional wrestlers are rivals in the ring but lovers at home.

Koitarou Samejima is the only child of the Karyuu, a sumo wrestler infamous for being foul-mouthed and vicious in the ring. Koitarou took pride in his father's strength and attitude, but one event changed it all. His father got involved in a bar fight, injuring multiple people. This led to him being expelled from the sumo league. Since the incident, his father was no longer the proud and strong sumo wrestler that Koitarou always admired. Years have past since his father died by challenging a truck in a tackling match. Now, Koitarou can't resist entering the sumo world and challenging all who stand in his way to become the next champion. (Source: MangaHelpers)

Chinmi, an orphan who lost his parents in a tidal wave, is a promising sumo wrestler. Even though he did very well in the junior championships, none of the sumo scouts were interested in signing him because of his body, which is unsuitable for sumo wrestling, and also because of his weird sumo style. But luck comes his way when a small sumo school owner shows an interest in him and decides to take Chinmi into his school. There Chinmi begins his training to become a yokozuna...

Ryusei Arashi is a boy who was delicate by nature and needed hospital care until he was fourteen years old. Getting over dangerous operations, Ryusei has learned the basics of judo from his father, and is determined to live as a judoist. What fate is awaiting him?

Shino Houjou is running very late for her first day at a new high school she's transferred to, when she runs smack dab into Sanshirou, a big young man who is just as late if not even more so. It's not his fault that they've crashed into one another, but Shino is a bit of a crybaby and it doesn't get any better. Sanshirou is assigned to Shino to show her the ropes, something they both dread. Then things change as Shino sees the Rugby team in action and discovers that Sanshirou is being actively recruited by every "manly" sport in the school—all of which he excels at and none of which interest him. (Source: MangaHelpers)

Suginoha Tsukushi has worked too hard her entire life to be denied job after job after graduating college. But reality is brutal and the last hope for an occupation was at Yumeneko Projects. She learns that she is competing for the position with Himezaki Fubuki, an art student who has won several awards for her design work. Both girls are shocked when the interview somehow gets them to participate in a "Cat Fight" where amateur girls fight each other in skimpy clothing for male entertainment. Tsukushi, being an uptight rule follower, has major hesitations but with her rival Fubuki so willing, what choice does she have? (Source: MU)

The story follows Tachibana Misaki, a 15-year-old girl who's bullied at school. In her quest to become stronger, she decides to enter the delinquent path, aiming for a shinny tomorrow.