Kazuki Hoshino leads the easy-going life of a typical high school student--until the appearance of a new girl in his class turns his world upside down! Introducing herself with a promise to "break" Kazuki is abnormal enough to make an impression, sure, but why does she seem so familiar...?

Kazuki intended to keep Daiya's plan from coming to fruition with the Silver Screen of Broken Wishes, but things didn't go exactly as he expected. And after the shocking revelation about O's true identity, everything is about to change...

In the final volume of The Empty Box and Zeroth Maria, Kazuki makes his last stand against O to fulfill his vow to bring back the "zeroth" Maria-the real Maria. But what does fate have in store for them...?