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.
as Takaaki Hisada (young)
as Kenji Takemoto (young)
as Ryoko Hisada
as Takaaki Hisada
as Hiroshige Hisada
as Masayo Takemoto
as Uchida
as Yayoi
as Ako
as Takeo Ouchida
as Kanayama
as Yuka
as Manabu Miyata
as Ichikawa
