Naru and Keitaro aren't talking and it's time for the Summer Festival.  All the girls dress up in their Yukata and Keitaro spends most of his time with Shinobu.  Sarah is staying at the Inn while Seta is on another dig and she can't dtand to be away from him.  She decides to cause trouble so they'll kick her out.  Things backfire on her when she discovers that Kaolla might just be worse than her.  They end up on a deserted island where Seta and Mitsune rescue them.