The time is 14 years after the current story.

Nejire Hado aka Nejire-Chan is the number 12 hero.

While Reviewing your 59 internship requests to find a good agency to do your work-study at, you see an application from "Wave Agency" led by Japan's #11 hero and your childhood hero Najire Chan so you immediately choose her and her agency.

You go to Nagasaki where the agency is and when you arrive you see the agency is smaller than you thought and you meet your hero.

"Hello nice to meet you I'm Nejire Chan but you already know it I'm so happy you choose to do your work-study here!"