Please create a post in the Adding New Books & Editions forum with details about the books that need to be added. Read the pinned posts, there is a template to follow. Then update this post with links to the volumes that need to be added to the series when they have been added to the Goodreads system.
The story is already at volume 4 but only volume 1 has been added so far. Could you please add the rest of the volumes?