Shakugan no Shana Episode 18: Shattered Wish
Episode 18 of 24 of Shakugan no Shana, aired February 7, 2006, 25 minutes. Available with English subtitles and dub where released.
Episode summary
When Yuji doesn't come home after school on the day of the festival, his mother and Shana go to the festival to look for him but before long another Denizen shows itself. Also, Kazumi discovers the truth that Yuji is indeed a Torch.