Dead Dead Demon's Dededede Destruction Vol. 9 (manga)

It's just an everyday apocalypse.

Three years ago the aliens invaded Tokyo.

Nothing was ever the same again.

But after a while, even impending doom starts to feel ordinary.

Oba and Makoto are lurking in Oran's memories from an alternative timeline where she and Kadode simultaneously save the earth and ruin their lives. When the worst happens, Oran takes a desperate leap into another timeline. But things don't seem to be going very well in that timeline either.

Good thing there are endless timelines, right, Isobeyan?