ナナの情熱的なライブを見ためが姉ぇは熱い気持ちになり、三日間の夏休みに突入。その間、店長代理を任されたナナの執事の氷山。いのりたちも、みんなでお店のお手伝いをすることに。ナナの宣伝のおかげで、お客さんがたくさん訪れ、張り切るおねがいかなえ隊。――と、そこに塩木がやってくる。エマと共に、『おねがい町ふしぎ研究会』に所属する塩木。彼女は、夏の間しか見られないという、『真夏の青い宝石』を一度見てみたいとねがっていた。その思いを受け取り、エマがライブにのぞむ。
After seeing Nana's passionate live performance, Megane's older sister was filled with emotion and embarked on a three-day summer vacation. During that time, Nana's butler, Hyozan, was put in charge of acting store manager. Inori and the others also decided to help out at the store. Thanks to Nana's publicity, many customers came, and the Wish-Fulfilling Team was full of energy. --And then Shioki arrived. Shioki, along with Ema, belongs to the "Wish Town Mystery Research Society." She had wished to see the "Midsummer Blue Jewel," which is said to be only visible during the summer. Taking her wish to heart, Ema took to the stage for the live performance.
