A shut-in NEET named Ren Kanzaki suddenly gains a mysterious ability called… Before Death! Whenever he dies, time rewinds. What will he do with such an ability? “I'll change the world, of course! MUHAHAHAHAHA!” Ren wants to change the world. End every war. Leave no one hungry, homeless, or forgotten. Give everyone a happy ending. Such a foolish goal for someone with no money, no skills, no knowledge, no influence or power. And left hopelessly alone in a world where even the tiniest mistake could cost him everything. But Ren intends to change the world anyway. —Even if all he has is his worthless self, and an ability that only works when he dies. Even if he has to... Die over and over. Again. And again. And again.

Surely, if he keeps dying, he’ll change the world eventually… right?

...Right?

“Of course I will! Just you watch! MUHAHAHAHAHA!”