The Beast of the Underground Water System: Monster
On a quiet afternoon, Doc is taken to the sewers of the Artemis Institute by a mysterious creature. With Melie's help, Seth goes to the depths of the city to save his friend.
Aired 17/11/2018EP 7 - The Beast of the Underground Water System: Monster

2018
RADIANT
Seth dreams of being a great sorcerer. He wants to be powerful and defeat the Némésis, monsters that come down from the sky. But his eagerness constantly gets him into trouble. He can’t seem to avoid angering the villagers and even his guardian, Alma. One day, an enormous Némésis really attacks the village! Determined to save the world, Seth embarks on a journey in search for the “Radiant,” the legendary lair of the Némésis. Making new friends, fighting tough enemies, and confronting hardships, Seth’s adventure begins!
(Source: Crunchyroll)