Illya's enjoyable summer isn't over! After changing into a yukata, she joins the usual gang and heads to a local festival. As Illya enjoys yo-yo fishing and lottery drawings at the festival, she realizes something dire--she was supposed to wear underwear beneath her yukata! A great tragedy befalls upon her!
I know that was the case for me, 
and in anime, it's often like that.
Bei mir war’s so und in
Anime sieht man das auch oft,
Sé que así fue conmigo y 
suele pasar en los animes,
Sé que así fue conmigo 
y suele pasar en los animes,
C’est vrai que c’était mon cas,
et c’est pareil dans les animés,
Ha detto che era il mio caso 
e che anche negli anime succede spesso.
Eu sei que esse esse foi o meu caso,
 e nos animes também costuma ser assim.