Prodigy detective Mitsuko Unagi is on the hunt for a notorious serial killer known only as "Eleven". It started 10 years earlier, on February 29th, 2009, when a series of murders began, involving 11 randomly selected victims killed simultaneously in
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Scooby-Doo! and the Reluctant Werewolf
Lola's Secret
Scooby-Doo! Abracadabra-Doo