The story of the Jujutsu Kaisen sequel, Jujutsu Kaisen: Modulo, begins in 2086 with the arrival of the Simurian aliens, refugees with abilities similar to jujutsu sorcerers, on Earth. The chapter introduces Yuka and Tsurugi Okkotsu, Yuta Okkotsu's grandchildren, who are both jujutsu sorcerers. Yuka inherits Yuta's ring, while Tsurugi, who has a heavenly restriction similar to Maki Zenin, must prove his strength. The story sets up a conflict as the aliens share a surprising connection with sorcerers, potentially explaining the origin of jujutsu powers.

Yuka and Tsurugi become one of the sorcerers, there inspector name Maru, Maru is an alien Jujutsu Sorcerer and one of the three main protagonists in Jujutsu Kaisen: Mojuro, the sequel to Jujutsu Kaisen. Maru's alien nature introduces a new, extraterrestrial dimension to the series' lore, creating mystery around the origins of Jujutsu and Cursed Energy, and he has a lively personality that contrasts with the other protagonists.