Haruhi in Wonderland! - S1.E13

Haruhi's dream about the day of her admission into Ouran High School becomes a trippy Alice in Wonderland-esque fantasy. Her friends try to tell Haruhi something important, but she only realizes it when in court. At the end of the dream, she meets her mom, who tells her to "enjoy a dream like student life." She wakes up with tears in her eyes, and sees the club dressed up in costumes that look like the ones they wore in her dream.