Level E is a Japanese manga series written and illustrated by Yoshihiro Togashi. The plot follows the misadventures of alien Prince Baka Ki El Dogra, who crash-lands on Earth and forcibly begins living with high school student and baseball player Yukitaka Tsutsui. However, Prince Baka gradually realizes that he is targeted by aliens from other planets, and he uses his clever wits to somehow maintain world peace each time. Along with its short length and more realistic art style, the story of Level E focuses much more heavily on humor than Togashi's more famous series Yu Yu Hakusho and Hunter × Hunter.

Pierrot Co., Ltd. is a Japanese animation studio established in May 1979 by Yuji Nunokawa, previously an animator and director for Tatsunoko Production. Its headquarters are located in Mitaka, Tokyo. Pierrot is renowned for several worldwide popular anime series, such as Naruto, Bleach, Tokyo Ghoul, Yu Yu Hakusho, Black Clover, Boruto: Naruto Next Generations, Ghost Stories, Great Teacher Onizuka, and Saiyuki.