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...
it really did come together 
in just about a month.
شُيِّد في غضون شهر تقريباً
wir es in rund einem Monat echt geschafft.
realmente lo terminamos en un mes.
realmente lo hemos terminado en un mes.
le bâtiment a pris forme
en à peine un mois.
l'abbiamo quasi realizzato in un mesetto...
conseguimos mesmo levantar tudo
em apenas cerca de um mês.
Мы и правда за месяц
умудрились управиться!