How to say “They'd already inflated all the balloons when we arrived — the one part I'd actually come to see.” in Japanese
In Japanese
着いたときには、もう全部の気球を膨らませたあとだった。そこが一番見たかったのに。
Tsuita toki ni wa, mō zenbu no kikyū o fukuramaseta ato datta. Soko ga ichiban mitakatta noni.