Ep. 1: Kazuya e colegas de classe formam um clube para investigar cuecas desaparecidas e atividades de Amasogi

Kazuya Kagami has a dream about a mysterious Amasogi. In order to deal with the Amasogi at school, Kazuya and Kiriha Obina make a club with class' 2-2 classmates (Shirou Shiramine, Osamu Osanai, and Chisato Chikaishi). They investigate the cause of girls' underwear gone missing at school. Another group of students is involved in activities with an Amasogi.

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