At Shirahamazaka High School, a special recital is held every year in which music students are able to showcase their talents in front of professionals and other prestigious guests. A third year, Konatsu Miyamoto desperately wants to sing in her last high school recital, but because she screwed up the year before, the vice principal has barred her from participating. That's when Konatsu comes up with a new plan to get involved; instead of joining the official choir, she'll form her own singing club with her friends! Unfortunately this proves to be harder than she imagined. Her friend Wakana Sakai, has given up on singing, for one, and Konatsu needs more than just two members. With only a month left until the recital, will Konatsu be able to find enough members for her club and actually be ready to sing at one of the most important events of the school year and graduate without regrets?

The Celestial Records speak of the existence of the "Seraphim," a race of divine beings who give blessings to humanity and are offered prayers by them in return. Those who are anointed with the ability to interact with these spirits are known as "Shepherds." Hailed as heroes for their prompt appearances in times of crisis, while also being feared for their power, the Shepherds are imprinted in common folklore along with the Seraphim. Sorey is a young human who has spent his entire life living in harmony alongside the Seraphim in the village of Elysia. Fascinated by the myths of the Celestial Records, he explores some nearby ruins with Mikleo—his childhood Seraphim companion—hoping to enlighten himself about the Seraphims' history with mankind. Unfortunately, they become trapped in the depths of the historical site during their investigation. While searching for an exit, they come across a mysterious girl who desperately seeks the help of a Shepherd to save the world, which is on the brink of being consumed by darkness. Despite Mikleo's warning about making contact with other humans, Sorey decides to help the stranger, which unknowingly leads him closer to the dream of peaceful coexistence between man and Seraphim. [Written by MAL Rewrite]

Magano, a parallel realm filled with monsters known as "Kegare," is a place where exorcists deal with all impurities. Benio Adashino is a prodigy exorcist who is recognized for her strength and is summoned to Tokyo by the Exorcist Union. On her way, she plummets into the arms of Rokuro Enmadou, a young exorcist with a troubled past. But the impurities of Magano do not rest. When these two exorcists witness a couple of children stolen by a Kegare, Benio rushes to save them, dragging Rokuro along with her into Magano. Engaged in a fight she is on the verge of being defeated in, Benio is saved by Rokuro, revealing himself capable of being her rival in talent. Sousei no Onmyouji tells the story of two talented exorcists who are destined to become the "Twin Star Exorcists" and the prophesised parents of the Miko—the reincarnation of Abe no Seimei—who will cleanse the world of all impurities. [Written by MAL Rewrite]

The Achiga Girls' Academy in Nara once defeated regional mahjong powerhouse Bansei High School. It advanced into the national team semifinals but lost to the eventual champion, and the mahjong club was later disbanded.

Six years later, elementary school student Shizuno Takakamo befriends transfer student Nodoka Haramura. The two eventually enter Achiga Girls', but Nodoka transfers out of the school in the second year.

When Shizuno sees Nodoka on television the following year as the national middle school individual mahjong champion, she decides to revive Achiga's mahjong club.