The manga artist Yamamoto said in 2016 that he usually gets permission to add feelings from his own life to the story; he did not say who gives it

How it’s built

1. Reported by Anime News Network from the manga's creators' appearance at the Barcelona Manga Fair, published November 2016.

What we assumed

Nothing. The figure is used as published.

Sanity check

Who approves the story is not named, so it shows creative freedom, not who controls the rights.

Where it comes from

The line in the source

I have quite a great deal of freedom and I usually get permission to add some feelings I'm actually experiencing in my own life to the story