After the trouble at the hot springs, the girls get an opportunity to promote a local legend. After they fail to chicken out, their next gig involves a train to Kashima to steal a muddy spotlight.
The idea you had about changing 
the harmony did the trick.
الفكرة التي خطرت على بالك وهي 
تغيير التناغم أدّت الغرض
Tu idea de cambiar la armonía funcionó.
Tu idea de cambiar la armonía
ha funcionado.
A ideia que você teve de
mudar a harmonia funcionou!
Твоя идея насчёт звучания помогла.