The Devil Behind the Stage Still Smiles Today

Yuzuki Roa, a devil from the demon world, has blended into the shining VTuber agency NIJISANJI to prank humans. But her personality is too kind, so every prank ends up helping people instead. Today she messes up on stream again and makes her viewers smile. But the protagonist of this story is not Roa herself. It's Takumi Yamada, a plain and invisible staff member who supports her behind the scenes. He's a rookie manager for Roa. Every day is chaos as he gets dragged around by the energetic Roa.