Finally, construction on the secret hideout begins! When Serufu invites Purin to build it with them, Purin’s secret is revealed. Together, the club members work through rainy days and sunny ones while their summer vacation deadline draws nearer.
Tomorrow, you'll start building 
your secret hideout.
.ستبدأن بناء مخبئكنّ السّرّيّ غدًا
Morgen beginnt ihr
mit dem Bau eures Geheimverstecks …
Mañana empiezan a construir
el escondite.
Mañana empezáis a construir
el escondite.
Domani inizierete a costruire
il nascondiglio segreto.
Amanhã começa a construção
do esconderijo secreto.
Завтра вы начинаете строить свою базу.