Sakura's Dizzy Fever Day
Sakura develops a fever, but goes to school anyway, concerning her friends. She nearly collapses, but is carried home by Toya. Later, Sakura senses the Cloud Card nearby, which she thought its name was Rain, using the Mirror Card to take her place while she goes to catch the card. Toya finds out, but allows the Mirror to stay. Sakura is berated by Syaoran and Meiling, but they help her to catch the Cloud Card.
Aired 27/04/1999EP 39 - Sakura's Dizzy Fever Day

Cardcaptor Sakura
One day, Kinomoto Sakura, a 4th grader stumbles upon the mysterious book of Clow. Upon opening it and reading the name of The Windy aloud, Sakura scatters the cards to the winds. Sakura is elected and appointed by Keroberos, Guardian of the Cards to capture the remaining cards. With her friend Tomoyo and rival Syaoran, Sakura begins an adventure that will forever change her.