第 1 季，第 5 集: Rimuru decides to throw a summer festival resembling the ones held in Japan; the monsters have never experienced a summer festival, but when they hear that it's a party, they go all-in to prepare.
第 1 季，第 5 集: Rimuru decides to throw a summer festival resembling the ones held in Japan; the monsters have never experienced a summer festival, but when they hear that it's a party, they go all-in to prepare.