A dark age of cooking befalls Tootsuki Culinary Academy. With the Elite Ten's devastating coup d'état, Azami Nakiri is now the director of the prestigious school. Students must now conform to Azami's ideology of true gourmet food and are forbidden to express creativity, or else face expulsion. However, Souma Yukihira and the members of the Polar Star Dormitory refuse to accept these changes. Aided by other rebellious first-years, including the tenth seat, Erina Nakiri, Souma and his allies band together to fight off supporters of Azami's regime. But corrupt instructors and the menacing Central organization stand in their way, and so they must work together, harder than ever before, to survive every underhanded plot designed to banish them from the school.

Following the sudden changes to Tootsuki Culinary Academy's administration, Erina Nakiri runs away from home to escape the torment of her oppressive father. Taking refuge at Polar Star Dormitory, the chaotic environment she ends up in is a far cry from her usual refined lifestyle. However, with the help of her friends, Erina gradually finds her place among the dormitory's eccentric residents—creating memorable experiences outside the world of cooking along the way.

Tanis, a child genius, is the youngest son of two mad scientists. His family has spent their lives withdrawn from normal society living on an isolated island, where the couple conducts experiments on Tanis' siblings that result in them gaining abnormal abilities. However, this activity is put to a stop when they are caught and arrested. Tanis is brought by government officials to a more populated island, alongside his four siblings: Snow, a dog-human hybrid; Ashise, a plant-human hybrid; Aisley, a spider-human hybrid; and Suishi, a mind-reader. Being the only one who has not been genetically modified, Tanis takes on the responsibility of adapting his siblings to society, all while trying to conceal their' distinctive characteristics.

As preparations begin for Seishou Music Academy's yearly Seishou Festival, the girls of the 99th class are gearing up to perform their very own rendition of Starlight, the tragic tale of two goddesses drawn together by the glow of the heavens but destined to be pulled apart, never to meet again. Created to foster the next generation of theatrical talent, this girls' only school works to improve the singing, acting, and dancing skills of its students. One student is 16-year-old Karen Aijou, an easygoing girl who has dreamed of performing on stage since she was a child. Her love for theater is further invigorated when her childhood friend Hikari Kagura transfers to Seishou Academy. Through her old friend, Karen stumbles upon a secret elevator leading to a massive theater underneath the school. Hosted by a talking giraffe, this arena serves as a battleground where her classmates participate in duels to determine who among them deserves the title of Top Star, earning them the right to play one of the lead roles in Starlight. Emboldened by the promise she made with Hikari to someday be stars together, Karen enters these mysterious battles in the hopes of making their dream a reality.