Nagasaki in 1986. Hisada, who lives with her affectionate parents and her younger brother, although there are many quarrels between couples, is a fifth grader who loves Yuki Saito and Exogini. Hisada decides to go to Boomerang Island to "see the dolphins" with Takemoto, whose house is poor and avoided by his classmates. Drowning in the sea, getting entangled in the Yankees, and having a lot of trouble, but as the friendship between the two deepens as a result of this adventure, a sad incident that presages farewell occurs.
Ichiro Banka
Takaaki Hisada (young)
Konosuke Harada
Kenji Takemoto (young)
Machiko Ono
Ryoko Hisada
Tsuyoshi Kusanagi
Takaaki Hisada
Pistol Takehara
Hiroshige Hisada
Shihori Kanjiya
Masayo Takemoto
Ryo Iwamatsu
Uchida
Eri Murakawa
Yayoi
