The Shining Stars of the Past

This is a story about history Outside the universe, there is a mysterious world that does not know when it was born and will never perish. It is not afraid of time because it is independent of time. People summoned by this world are called summoners. They travel through various timelines, repairing the changed history, or recording possible futures. Three girls from Among Us, in order to protect history, fight fugitives and repair history, at the same time, a mysterious figure quietly pays attention to them The stars of history are shining in the long river, illuminating our era Oh, yes, that's a good story