第4話: Rinaはクジラの友人から故郷へ戻るよう促す手紙を受け取る。

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Rina gets a letter from her whale friend, saying she should return home. She also meets a flirty boy named Masahiro Hamasaki, whom she keeps on meeting. Rina changes her mind about the offer to return home at the last second. (Source: Wikipedia)