The Whereabouts of the Letter

Inori's friend, Mai-chan, has come to Onegai Town. Inori gives her a tour of Onegai Town. Mai-chan, a huge fan of AiPri, is thrilled to meet Inori, Olivia, Gumi, Emma, ​​Nana, and Aoi. She is also very happy to see Nana and Emma perform live. Another thing she wanted to do in Onegai Town was to meet her pen pal, Ayaka-chan. Inori and the others begin searching for her together. However, they discover that the picture book store where Ayaka was supposed to live moved a week ago...