एपि. 1: बारिश वाले क्लासरूम का रहस्य और ड्रीम हंटर्स की जांच शुरू

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The story begins with the mysterious disappearance of Kei Mizuno into a rainy classroom having become community discourse to such a degree that the Yume Tsukai are compelled to investigate; the Kayousei Yume Tsukai Rinko Mishima interceding against a nightmare that nearly seduces Yuuka Mori into cooperating with her own abduction becomes a brief practical tutorial about dreams that manifest themselves in ghastly physical form to wreak havoc along with the role of the Yume Tsukai in counteracting them. After a labyrinthine journey to the Warabe Yuusai Toy Store, the Nichiyousei Yume Tsukai Touko Mishima explains Yuuka the situation in more detail with a brief demonstration before Rinko returns with a dream fragment; even after several in-flight paper airplanes, it is still not exactly clear what the deviant diagnostic is. A visit from the girls' aunt Misako ultimately becomes the skeleton key for Touko to learn Yuuka's prologue with Kei along with the insight of what now needs to take place; a fierce battle laden with Shinto ritualistic mechanics later, Yuuka is left with a dangerous opportunity with how she handles her feelings for Kei. (Source: TVDB)