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.
I'm sick and tired of being 
Naofumi-sama's slave.
سئمتُ وتعبتُ من كوني أمَة لناوفومي-ساما
Ich will einfach nicht mehr
Meister Naofumis Sklavin sein.
Estoy harta de ser tu esclava.
Estoy harta de ser tu esclava.
J’en ai marre d’être ton esclave.
Non ne posso più
di essere la schiava del signor Naofumi.
Estou cansada de ser
escrava do Naofumi-sama.
Надоело мне быть рабыней
лорда Наофуми…