Onagawa Chuu Baske Bu: 5-nin no Natsu

The story is set in August of 2026 at the Fuji Training Facility. Natori Touko, a third-year middle school student in the Eastern Private Defense Academy, is entrenched in field training with instructor Kamiya. It has been a harsh training regiment, but it is finally the last day. Kamiya proposes a extracurricular class under the name Newest Weapons Research. But then, an incident occurs that rocks all of Japan.

Talk about games being called unexpectedly! Hasegawa Subaru joined the basketball club at Nanashiba High, only to have his hopes dashed when the teams' play is suspended after the captain is suspected of having inappropriate feelings for the coach's underage daughter. Blindsided and blocked by bad luck, Subaru expectedly finds an opening for his talent with the hoops when his aunt asks him to take on the task of coaching a young girls' basketball club - a Ro-Kyu-Bu!. But can a superstar wannabe find true satisfaction while playing sixth man to a team of five girls?

The Japanese team have been selected to compete in the World Junior Championships. Kozue, Midori, Kakinouchi and the other all-Japan teams, under coach Inokuma, work hard on rigorous training and head for New York, where the world's strongest players await. In the first round the team was immediately overwhelmed by the outstanding stamina of the American players, but the team managed. The final match has finally arrived. In order to defeat the spikes of the Soviet team, Kozue and her team devised a secret plan. Where will the glory shine? The time of the decisive battle is approaching.

It's every high school baseball team's dream to go to the legendary Koshien Stadium Tournament. For the first time in years, Seido High School has a chance—star player Gorilla Matsui has finally given the team an opportunity to succeed. Most delighted at this prospect is Principal Kocho. However, the Head teacher reveals to him that the first game will be played against the Gedo High School, infamous for brutally killing all their opponents. Kocho instantly loses all hope, both for his students' lives and of winning the tournament.