What line is connected behind the Doors of Destiny Stone?

Beta world line. That is, in this article, enter the world line before the STEINS door world line brooch. This article is the first time that the brooch decided not to give up after the failure of rescue, and then it was rescued again, and received a text message in the future, which finally succeeded. But 0 means that the brooch chose to give up after the first failure and did not receive the text message. The assistant confirmed death, and the brooch lived on this world line. In addition, the Stone Gate of Destiny also has an episode called "Lost Chains in the (β) Realm", which is a zero episode of 0.