空ろの箱と零のマリア

Kazuki Hoshino loves his unremarkable daily routine more than anything. That routine shatters when Aya Otonashi transfers into his class and announces, to him alone, that this is the 13,118th time she has done so and that she intends to 'break' him. Her loops trace back to the Boxes, wish-granting devices handed out by an entity known only as 'O' that warp reality around their owners' desires. As Kazuki is pulled into Aya's repeating war over the Boxes, his ordinary life becomes the very thing at stake. This is a light novel series rather than a manga.