Wataru Kajika is a Japanese manga artist best known for illustrating "That Time I Got Reincarnated as a Slime: Clayman Revenge," a spin-off of Fuse’s light novel series "That Time I Got Reincarnated as a Slime." Serialized in Monthly Shonen Sirius since 2022, the manga follows the demon lord Clayman, who, after being defeated by Rimuru in the original story, finds himself transported back to an earlier point in his life and attempts to avoid the fate that led to his destruction. Based on a new story conceived by Fuse, the series turns a former antagonist into its protagonist, exploring Clayman’s relationships with his subordinates, his development as a demon lord, and the ways different choices reshape his destiny.