The slime Mikami and the Storm Dragon Veldora decide to give each other names. Veldora gives the slime Mikami the name "Rimuru," and Rimuru comes up with a family name for both of them: "Tempest." Then Rimuru uses his Predator skill to take Veldora into his body and analyze the "Unlimited Imprisonment" seal in hopes of breaking it... but this action sends a shock through the nations surrounding the Great Forest of Jura. With Veldora gone, there's a chance that the larger nations could become bold and invade the smaller provinces. With no knowledge of this, Rimuru leaves the cave and meets some Goblins.
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 .