The president of Yumeji's literature club, Mei Hoshino, has been sending texts with a mysterious boy named Chris Evergreen. Later that day, Yumeji, Mei, fellow club members Takateru Akiyanagi and Saki Kirishima bring Merry along to karaoke, whilst Isana tries to make friends with a transfer student named Chizuru Kawanami. Later that night, when Mei comes to Yumeji's family café having supposedly been stood up by Chris, she suddenly acts weird and texts herself from another phone. Yumeji realises that Mei has become a vessel for Chris, who is actually another dream demon, and chases after her, ending up in her daydream. As Chris prepares to attack him, Merry arrives and defeats him. Before Chris disappears, Mei asks to look at him, and comes off happily from what she sees. From that point, Yumeji decides to work together with Merry to help her find nightmares, and she starts working part-time at the café.
他人の夢が視える能力を使ってメリーを助けられないかと思う夢路。
夢魔の「器」にされることを心配して夢路を遠ざけようとするメリー。
そんなやり取りのあと、夢路の通う六花高校文芸部講評会の部長・星野鳴は、間違いメールで偶然であったクリスという人物に会いに行くがすっぽかされてSTOに立ち寄ることに。
彼女のメールのやり取りを何気に見ていた夢路は鳴が夢魔に乗っとられようとしているのを察知して叫ぶ。
「デイドリームを開け！」と…。
