Even though he is intelligent, several incompletes in his senior year require that he repeat it, putting him in the same graduating year as the rest of the gang. During this year, his relationship with Willow goes through rough water as he and Cordelia catch Xander and Willow kissing. They break up, but get back together again after Oz confesses he misses her ("Amends"). In the episode "Graduation Day, Part One," Oz and Willow make love before the impending confrontation with the evil Mayor Wilkins.