Rimuru is building a dungeon in preparation for the upcoming festival. It will feature treasure chests containing weapons made by Kurobe, and Veldora will inhabit the deepest floor as the final boss. Then Milim suddenly shows up with a suggestion...
You're with me, too! 
I have such a big family now!
!أنتِ معي أيضاً! لديّ عائلة كبيرة الآن
Mit dir sind wir
eine richtige Großfamilie.
Con Treyni,
ya somos una gran familia.
Con Treyni ya casi
somos familia numerosa.
Avec Tryney en plus,
on est une grande famille !
Visto che ci sei anche tu, Treiny,
siamo una graaande famiglia!
Treyni-chan, você também está comigo!
Agora minha família ficou tão grande!
Как я могла забыть о тебе?
У нас теперь большая семья!