Sakuya and Kaguya appear on TV with Aine and her friends before being 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.

Aine and Mio hold a concert for the reveal of their Diamond Dresses. As part of that concert, the members of Best Friends! want to thank their fans for their support. Mio gets a surprise when her father shows up to attend the concert, and a secret about the Diamond Dresses is revealed.

Everyone is taken by surprise at Hibiki and her Jeweling Dress. In an effort to unlock the dress' secrets, Mio and the other girls ask Hibiki to show them Space Aikatsu.

After a blizzard buries Aine and Mio's snow stage, the girls get a surprise when Karen and Mirai show up to help. The idols notice some children watching them and ask if they would like to do Aikatsu, which the children agree to. However after Karen and Mirai confront Alicia, the children suddenly change their mind, not wanting to do Aikatsu anymore. So Mirai decides to play a game to cheer everyone up, no one can say Aikatsu until she says so. Instead everyone must say 'evol ustakiA'.

Note: 'evol ustakiA' is taken from the Japanese 'キスイダツカイア', which is 'アイカツダイス' reversed. This is romanized as "Aikatsu daisuki" or simply "Love Aikatsu"

The idols are given a well-deserved break from work and spend the day at the beach.