“A Strange-Looking Waltz”
“Igyō no Enbukyoku ~waltz~” (異形の円舞曲 〜waltz〜)

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 Kaori Misaka, one of his classmates. He suspects they are siblings, though Kaori denies such a claim. As the school ball starts without a hitch, it is not long before a demon comes to attack.