You know the drill. Prevent the protagonist’s death—or the world ends.

The regressor said 'she' was the cause of mankind's destruction, so to save the world, 'she' decided to die.

If one day you woke up to realize there was another you—what would you do? This story depicts a silly romcom between two same individuals of opposing genders. --dotturndot

I wanted to live, to see you again.

I promised to live, but I’ll die for you.