Kaito Irie

When Tsukasa was a middle school student, she had a crush on transfer student Hayato and even confessed her feelings to him. She was turned down by Hayato. Now, Tsukasa and Hayato are classmates in high school. Hayato treats Tsukasa as just a friend, but Tsukasa still has feelings for him. Meanwhile, Hayato becomes attracted to Tsukasa.

Akari is a first grade high school student. She is positive, realistic and outgoing with romance. Akari though is not good at expressing her feelings. She become friends with Yuna, who attends the same high school. Yuna has a hard time talking with strangers and she is passive with romance. She has never been in love, but she dreams of having a romance like those drawn in manga. Even though Akari and Yuna have totally different personalities, they are now good friends. Yuna gets attracted to Rio who is Akari’s stepbrother and attends the same high school. Akari becomes attracted to Kazuomi, who is Yuna’s childhood friend and attends the same high school.

Its story is set in Aikatsu Planet, a world where everyone can become cute idols using an avatar. While spending school life, the main characters are aiming to become top idols. Everyday parts such as the main character's school life will be filmed in live-action, and the Aikatsu Planet! world will be drawn in anime and 3DCG (like the previous series). The live-action part's cast members will form a unit "STARRY PLANET*" and perform as idols at events and on YouTube. A new Data Carddass game linked to the TV series, "Data Carddass Aikatsu Planet!" is also scheduled to begin its service this winter.