So, I'm going to guess this isn't Komaku Juushoku's usual adorable work?

I guess in this story
Keine has passed away hundreds of years ago, and Mokou moved into Eientei while the lunarians have returned to the moon in a hurry.
Soon the gensokyo collapsed, all the youkais have died, and the acid rain started to pour endlessly, she was in anguish. But she can't die, so she had to bear the agony forever.
She dreamed of Keine, Keine told her that she was here, waiting for Mokou. Mokou didn't believe that, she thought it was a lie. But the warmth from Keine's hand was true.
Correct me if I am wrong.

The way it looks, it all seems to be a horrible, horrible dream of things that could happen.

Translation bump.