Though viewers are already aware of how their story ends, Season 2 of Jujutsu Kaisen reveals the missing details of Satoru Gojo and Suguru Geto's history. By painting more of a full picture for fans, it's shown that the two began as bitter rivals and became the best of friends not long before they had a tragic falling out and became enemies. While this nuanced relationship is original and significant for Jujutsu Kaisen's plot specifically, there is another shonen duo that matches their complicated dynamic and tragic story.