To End It All: All27 [Reborn]

Everyone except Tsuna is reborn. There are original characters. In the parallel worlds, everyone has died, leaving Tsuna alone, but he has already become a doll without consciousness or emotions. After learning of someone's plot, everyone is reborn in a parallel world that has not yet been destroyed, in order to save Tsuna. The other parallel worlds have long since been destroyed, and everyone's original world has already collapsed.

[I won't abandon this story, but updates will be irregular.]