Kanon (2006)

A Grotesque Waltz (1x12)

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Yuichi is starting to remember more about his past encounters with Ayu seven years ago, and the time he gave her a present, which he will grant three wishes for her. At school, Yuichi finally discovers that Shiori's surname is the same as one of his classmate's, Kaori Misaka; he suspects they are siblings, though Kaori denies such a claim. As the dance festival starts without a hitch, it is not long before a demon comes to attack.