Aine Yūki who is in the normal division of Star Harmony Academy is a girl who is good at making friends.
Aine became friends with the academy's top idol Mio Minato, and are about to appear on a stage together!?
Awaiting them are Maika Chōno and Ema Hinata, idols full of personality in which Aine and Mio will encounter, idols who are busy everyday with both idol life and school life!
The two form a pair and become "Friends", aiming to become the top idols, the bright "Diamond Friends"!
With the radiance of their dresses, idols Karen Kamishiro and Mirai Asukabelong to no other than the Diamond Class!
Along with all the drama gathered together! Dressing up the Aikatsu Cards!
The fans are friends, the cards are friends too! Lots of friends, lots of dreams!
"Aikatsu Friends!" is about to begin!
Summary taken from: MyAnimeList