大きな川を、いざ進もう。
ちいさな身体におおきな期待を詰め込んで。
速い流れも、冷たい風も。
ときに激しく揺れたって。

大好きなトモダチと一緒なら、
頼りない筏だって立派で誇らしい―――

世界にたったひとつの、素敵な豪華客船さ。

The children follow the big river wherever it goes, their little bodies brimming with hopes and dreams. It doesn't matter how fast the river carries them, how cold the wind blows, or how much the water shakes them. As long as they're with their beloved friends, even the world's flimsiest raft can be a beautiful one-of-a-kind yacht.