Season 0 of Yuuki Yuuna Is a Hero premiered on March 18, 2017.

Season 1 of Yuuki Yuuna Is a Hero premiered on October 18, 2014.

In her everyday life, Yuuki Yuuna is a hero. As proof, she is in her middle school's Hero Club, where she does her best to help others and bring a smile to everyone's face.

But Yuuna, always up to any task, is about to become an even bigger hero. Mysterious destructive forces called Vertexes begin threatening the world she loves, and the Hero Club is called upon by a strange phone app to save it. Along with her best friend Tougou Mimori, as well as sisters Inubouzaki Fuu and Itsuki, they must transform into magical girls in order to battle the Vertexes.

In between studying and putting on shows for kids, Yuuna and the Hero Club must fight for the very existence of their world and face the harsh truths behind their own powers, all the while discovering what it truly means to be a hero.

Season 2 of Yuuki Yuuna Is a Hero premiered on October 7, 2017.

Season 2 consists of a prequel to the first season (Episodes 1-6) and follows up with the sequel (Episodes 7-12).

**The Washio Sumi Chapter**

In the year 298 from the era of the gods, elementary school girls Sumi Washio, Sonoko Nogi, and Gin Minowa are tasked with an important mission. They are to become heroes and fight Vertex, a mysterious enemy that is attacking Shinju-sama, the god tree that protects Shikoku, the only area in the world that is still habitable. What they don't know, is that this fight will cost them more than they could have ever imagined.

**The Hero Chapter**

Sequel of Yuuki Yuuna wa Yuusha de Aru.

Season 3 of Yuuki Yuuna Is a Hero premiered on October 2, 2021.