between always and never
A Past Lives AU with a bittersweet ending.
If you haven't seen Celine Song's Past Lives, I have been deep in the brain rot since I've watched it. This idea came up in the aftermath as to what would happen if Remus and Sirius reunite years after Hogwarts and the war.
Title from Call Me By Your Name and originally the Paul Celan poem. Thanks to @wrenaspun for the cheerleading.