After the Milky Way stabilized, the cultural and entertainment industries began to flourish. The 'horror stories' that were popular some time ago were quickly used by businessmen who smelled business opportunities and soon formed a stable industrial chain.
"...Have you heard? One of the 'Top Ten Unsolved Mysteries of the Milky Way' that has been trending on the Internet recently seems to be related to the place we're about to enter...."
Two young alien tourists were discussing the 'Unsolved Mysteries of the Milky Way' in a tourist spaceship filled with tourists.
The spaceship they were on was originally going to a 'Zoo Galaxy' for a tour, but a particle storm inexplicably appeared in the galaxy they had to pass by, which forced them to take a detour to the 'Zoo Galaxy.'
"Of course, I heard...It seems like countless spaceships had mysteriously disappeared in this place. Even the discoverer of the galaxy has disappeared...."