Sae comes from a very strict family, so when her sister announces she will be visiting. She needs the help of all her friends to make a good impression. 
In that case, let's hurry 
up and clean this place.
Si ese es el problema, 
entonces recojamos rápido.
Pues si ese es el problema, 
mejor que ordenemos de una vez.
Neste caso, vamos arrumar
 este quarto de uma vez.