The last year of high school is always a time of both looking forward while reflecting on the past. Can something as simple as a choir club really heal past wounds and soothe the pangs that come with growing up? Can music really bring people together? Three students, the former music student Wakana Sakai, equestrian Sawa Okita, and choirgirl-turned-street performer Konatsu Miyamoto, discover the answers while learning how to grow up through the medium of song in TARI TARI!
Miyamoto, not finally in her senior year, desperately wants to sing in the upcoming joint recital. The school's vice principal forbids it, forcing her to find another way.
Konatsu has at last pieced together a ragtag choir group. Fate, as it seems, has other plans and continues to throw obstacles in her path.
Kona’s Choir Club falls apart before it fully takes off. She won’t let it stop her—she just needs to find three new members to save her club.
Kona lends her group’s stage to Conder Queens for the World Music Festival. Later, the rift between her and Sawa becomes apparent when Kona’s devotion to the group begins to overshadow her friendship with Sawa.
While the choir group is cheering for Tanaka, Waka seems to be withdrawing further from the group and tries to move on from her mother’s memories.
Konatsu reminds Wakana of her promise to write a song together. Later, Wakana’s father tells her why Mahiru kept her illness a secret: she didn’t want to tarnish the memory by making it a sad one. Wakana’s love of singing returns, and she joins the rest of the club in song.
Wakana is an official member of the Choir and the Badminton Club. Everything seems copacetic until Sawa begins to act weird.
Sawa's dedication to be accepted to her dream school is taking a toll on her emotionally and physically. She feels alone in her journey, but her friends will soon prove her wrong.
Since the students are prohibited from having after school jobs, the club has no money to perform at the White Festival. When a job offer is presented, they seek the approval of the vice principal.
The group begins to really own their new role, but the Vice Principal isn't as happy. She asks them to quit, but the group isn't ready to throw in the towel.
The choir club continues its hard work on its musical, but it may be in vain. The school festival is cancelled and the school is being closed down. Just as all hope seems lost, Wakana finishes her song and the group organizes a festival of their own!
The students are dealt two blows: not only is the White Festival cancelled, but school as they know it is over!
The Choir and the Sometimes Badminton Club are determined to put on their show with or without committee approval. The White Festival may be cancelled, but the show WILL go on!