A new force has suddenly risen to power in the Great Forest of Jura, and its leader, Clayman, proposes that the Demon Lords hold Walpurgis with the goal of sanctioning the slime who deceived him. Rimuru also begins to prepare for a battle with Clayman, but observing the enemy army's movements reveals that Clayman's target is not Tempest, but Eurazania. Clayman's army will arrive in Eurazania within two days. Can Rimuru's forces get there in time?
Elenco: Miho Okasaki , Akane Kumada , Itaru Yamamoto , Tomari Asuna , Haruki Ishiya , Chikahiro Kobayashi , Rie Tanaka , Ryuuichi Kijima , Kengo Takanashi , Yumiri Hanamori , Juri Kimura , Sayaka Senbongi , Rina Hidaka , M・A・O , Takaya Hashi , Hōchū Ōtsuka , Megumi Toyoguchi , Atsushi Ono , Makoto Furukawa , Kazuya Nakai , Tomoaki Maeno , Jun'ichi Yanagita , Kanehira Yamamoto , Takuma Terashima , Kenjirou Tsuda , Ken Narita , Jun Fukushima , Takuya Eguchi .