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From "That Time I Got Reincarnated as a Slime" Season 4, which begins broadcasting on April 3, the synopsis and preview stills for Episode 73, "New Days," have been released.
Following the Founder's Festival, Tempest takes its first steps toward the "Human-Monster Prosperity Zone." However, behind the scenes, the former Hero Granbell (CV: Daisuke Ono) and his granddaughter Mariabell (CV: Inori Minase), who view Demon Lord Rimuru's (CV: Miho Okasaki) rise to power as a threat, are weaving a sinister plot. Furthermore, Demon Lord Leon (CV: Jun Fukuyama) begins to make his move. As a new Hero is about to awaken, the intentions of each faction intersect, marking the start of Rimuru's next battle. It has been confirmed that the fourth season of the TV anime will be broadcast in five split cours, starting with two consecutive cours this April on NTV-affiliated stations and BS11.
Episode 73 "New Days"
[Synopsis]
Even after the Founder's Festival has concluded, Tempest shows even more signs of life than before.
Adventurers gather in the city, and the Dungeon is a massive success! ...Or so it should be, but it seems there is an unexpected problem within that very Dungeon—.
(c) 川上泰樹・伏瀬・講談社/転スラ製作委員会
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