Nagasaki in 1986. Young friends Hisada and Takemoto decide to go to Boomerang Island to "see the dolphins". The friendship between the two deepens as a result of this adventure.
Takaaki Hisada (young)
Kenji Takemoto (young)
Ryoko Hisada
Takaaki Hisada
Hiroshige Hisada
Masayo Takemoto
Uchida
Yayoi
Ako
Takeo Ouchida
Kanayama
Yuka
Manabu Miyata
Ichikawa
