Wakaba Kohashi, a sheltered rich girl, dreams of becoming a fashionable and trendy gyaru because she admires their outgoing and carefree nature. With this goal in mind, Wakaba begins the school year hoping to make her high school debut as a gyaru. On the first day of class, she meets the pure Moeko Tokita, the serious Nao Mashiba, and the eccentric Mao Kurokawa, and the four of them quickly become friends as they learn about and imitate each other's lifestyles. Wakaba*Girl follows the adventures of these four friends while they experience events like school festivals, waterpark trips, and gym class tests. Along the way, Wakaba discovers what it is like to live as a regular student while Nao, Moeka, and Mao catch a glimpse into the life of a rich family. With never a dull moment in their lives, the four girls make sure to live each day to the fullest.

The tropical Seiren Island is a paradise for deviants: the infamous Pervert Law grants near-complete sexual freedom with almost no taboos or boundaries. With its various suggestive attractions, the Seirantou Health Organization (SHO) entices visitors while providing regular medical checks and contraceptive pills to ensure carefree enjoyment. However, for high school student Junnosuke Tachibana, the island is far from ideal. Having recently moved there with his younger sister, Asane, he cannot stand the empty, loveless sexual acts. To make matters worse, Junnosuke's abstinence attracts unwanted attention—and those who defy the law face punishment. Junnosuke soon crosses paths with Nanase Katagiri, a notorious island seductress. Surprisingly, instead of forcing herself on him, she helps him flee from the SHO. Together, they discover a secret group that exists for a singular goal: to destroy the SHO. Now equipped with a way to resist the unjust rules, Junnosuke and other kindred spirits set out to crush the Pervert Law.

Experienced voice actor Yasumi Utatane works hard to maintain her image as a pure and innocent idol to please her fans, even as she struggles to find more jobs in the industry. But Yasumi has a secret—she is actually Yumiko Satou, a high school girl who prefers loose clothes and flashy jewelry, a complete contradiction to her false professional persona. As Yasumi, Yumiko is finally offered an exciting opportunity to do a radio program alongside another up-and-coming voice actor she admires: Yuuhi Yuugure. In Yumiko’s eyes, Yuuhi’s cute looks and talented acting embody what a voice actor should be. As soon as they are introduced at the recording studio, however, Yumiko realizes that Yuuhi is actually her gloomy classmate, Chika Watanabe. Together, the pair commit to their radio program and slowly begin to open up. In supporting each other, Yumikoi and Chika gradually learn to be true to themselves.

As the all-girl band Poppin’Party continues to rise in fame, they find a poster for an event at the legendary Nippon Budoukan. Now determined to participate in the BanG Dream, Kasumi Toyama and the other members of Poppin’Party aim to reach new heights and prove their worth by performing on that renowned stage. Meanwhile, rival band RAISE A SUILEN dreams of changing the world with the strongest music, but finds itself in dire straits without a guitarist. Though dozens of potential candidates audition for the role, band leader CHU² believes them to be amateurs and unsuitable for the band. However, there may be one guitarist that lives up to CHU²’s high standards. BanG Dream! 3rd Season features multiple all-girl bands, including Poppin’Party, Afterglow, Pastel*Palettes, Roselia, Hello Happy World!, and now RAISE A SUILEN, as they work to astound fans throughout Japan with their spectacular performances. As the BanG Dream competition draws near, the band members are prepared to captivate audiences with their heartfelt music!