Sakuya and Kaguya appear on TV with Aine and her friends and afterwards are given the task of producing a video tour of their home. Aine and the others offer to help and end up discovering a treasure map that leads to some treasure the twins buried when they were younger. The girls feel that going on a treasure hunt and filming it would make a much better video, but Sakuya and Kaguya are reluctant to go and find what they buried.

The line-up for the Diamond Friends Cup is decided with Pure Palette facing Honey Cat on the first day. Also with Christmas around the corner, the Friends decide to exchange gifts, but Aine has trouble finding the right gift for Mio.