Keiko Himuro, Chairman of the Kisuragi School, puts together an all-girl baseball team led by Ryo Hayakawa, daughter of a legendary pitcher, in hopes of proving that girls can compete just as well as boys. Their goal: Koshien Stadium, where only the best teams get the opportunity to play. (Source: ANN)

A slapstick comedy on a bomb uproar, and a touching story about the ties between the Nohara Family and their dog Shiro. A film in the musical style including the scenes with inserted songs. When the Nohara Family enjoy a trip to Okinawa, a strange object like a flying saucer becomes stuck with Shiro's bottom. That is a special bomb dropped by "The Only Buttocks Aliens," and it has the power to destroy the whole earth. The space monitoring center "UNTI" (Unidentified Nature Team Inspection) begins to pick up the bomb, but a female terrorist group "Hinageshi Opera Company" tries to get the bomb and disturbs UNTI's work.

The Achiga Girls' Academy in Nara once defeated regional mahjong powerhouse Bansei High School. It advanced into the national team semifinals but lost to the eventual champion, and the mahjong club was later disbanded.

Six years later, elementary school student Shizuno Takakamo befriends transfer student Nodoka Haramura. The two eventually enter Achiga Girls', but Nodoka transfers out of the school in the second year.

When Shizuno sees Nodoka on television the following year as the national middle school individual mahjong champion, she decides to revive Achiga's mahjong club.