A pair of mysterious voices lead 14-year-old Ai Ohto to a strange egg, promising her a chance at what she wants most. What's inside the egg? And what does Ai really want?

Ai meets Neiru, another girl who is buying Eggs. She's given the cold shoulder at first, but could that change after the next time they crack their Eggs? Assuming they make it back alive, that is.

While buying Eggs for herself and Neiru, Ai meets Rika, a former idol who is there for the same reason. Rika quickly pushes her way into Ai's life, but what lies beneath her cheerful and callous exterior?