is jujutsu kaisen episode 11 filler?

Nanami and Mahito's battle reaches its climax underground. Yuji befriends Junpei over shared love of movies, visiting his home and meeting his mother.

The two storylines run in tragic parallel: Yuji building a genuine connection with Junpei while Mahito engineers the boy's destruction. Junpei's mother is killed by a curse — placed by Mahito as deliberate manipulation.

Junpei's grief transforms into rage, and he walks the path Mahito designed for him.