Gekijou-ban tensei shitara slime datta ken: Soukai no namida-hen

Rimuru Tempest (Miho Okasaki) and his companions are invited by Elmesia El-Ru Sarion, the Celestial Emperor of the Sorcerous Dynasty Thalion, to a private resort island. There, they meet Yura, a mysterious woman with ties to the underwater Kingdom of Kaien. As tensions rise, Rimuru and his friends, including Shion (Mao Ichimichi) and Gobta (Tomoaki Maeno), team up with Yura to stop Djeese's plan to awaken the mystical water dragon, which threatens the surface world. Along the way, Yura's true identity is revealed, and her connection to the water dragon is explored.