Aine and Mio think about what more they can do before the final round of the Diamond Friends Cup against Love Me Tear. To their surprise, Mirai shows up at Aine's home and tells the girl about Karen. Karen has been holding back her abilities as an idol ever since she and Mirai became Diamond Friends because the Friends unit, the two competed against dropped out, fearing they would never be able to match Love Me Tear. Mirai wants to go all out against Pure Palette and unleash the Love Me Zone, Love Me Tear's own version of the Aikatsu Zone, but is afraid that Karen's feelings will prevent it. However, Aine comes up with an idea to hold a sleepover at her house so both Friends groups can get to know each other better, hopefully convincing Karen to open up about her feelings.