The Empty Box and Zeroth Maria, Vol. 2 (Light Novel), Paperback/Eiji Mikage

(Volume 1) 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 downIntroducing herself with a promise to ``break`` Kazuki is abnormal enough to make an impression, sure, but why does she seem so familiar...?