Yuki Yuna is a Hero: The Washio Sumi Chapter

Years before the events of Yuki Yuna is a Hero, there were others who protected the world. Their names were Sumi, Sonoko and Gin. This is their story.

The trio grows closer, but that doesn’t mean they can work as a team. They need a training camp to hone their skills.

It’s important to take it easy every once in a while, but Sumi doesn’t know if she can afford to relax.

Sumi, Gin and Sonoko look forward to the class trip and deepening their bonds of friendship.

The Vertex are unrelenting and do not care about the devastation left in their path. The heroes must deal with the aftermath.

The heroes have new abilities at their disposal that may give them the edge they need against the Vertex.