According to the company’s guidelines, doujin works may not include art or animation lifted directly from the game, branding or logos either lifted from the game or designed to be evocative thereof, game scenarios, or music.
Rights holders are coming forward swiftly to shut down doujin creations, with Love Live! being one of the most notable to lay down a zero-tolerance policy.
Often, the statements given are so broad and generalized that it’s hard to tell how “zero” the zero-tolerance is.