In doubt of where to go

AU fanfic. Shinji Ikari travels the universe from the universe with the goal of uniting or helping the Shinji's and Asuka's of that universe. During a break in the place where the Tree of life (Tree of Shinji's) the branches that hold a universe have started breaking one from one, Shinji now must face this anomaly and destroy it before it changes all the universes of Shinji's.