Time Bomb
Usagi's Disaster: Beware of the Clock of Confusion
Usagi no sainan! Awate tokei ni goyojin
"Usagi and Ami go to the city to enjoy some shopping, where they find a clock store selling a clock that resembles Luna. Later that day, Usagi is happy to learn that her mother bought the exact same clock as a gift. But that night, the clock emits a strange light that causes Usagi to become very impatient." (source)