The mysterious girl that showed up out of nowhere was actually Filo. She's a filolial queen with an advanced transformation ability, and she can even take human form thanks to it. However, her clothes get ripped every time she transforms, meaning Naofumi has to get her some magic clothes if he doesn't want to go broke. The party leaves on a new adventure to gather the materials required.
The gemstone's right there, 
but we can't get it.
الحجر الكريم هناك، لكن لا نستطيع الحصول عليه
Dabei liegt uns unser Ziel
doch vor Augen.
Notre objectif est juste
sous nos yeux…
Abbiamo le gemme davanti agli occhi,
ma non possiamo raggiungerle.
A gema está aqui e mesmo assim...
И ведь до нашей цели рукой подать.