A completely ordinary high school student who loves idle chatter with his friends and Umaibōs, a Japanese snack. One day, he somehow suddenly antagonizes Aya Otonashi — even though he has never met her before. She threatens to “break” him.

Kazuki Hoshino treasures nothing more than his ordinary life, and March 2 should have been an ordinary day. The arrival of a transfer student, the mysterious Aya Otonashi, shouldn't have shattered the world he knows. He's never seen this girl before in his life, but she says she's met him thousands of times--and declares war on him for a crime he can't even remember... As the truth begins to unravel, nothing is as it seems, and at the heart of it all is a wish powerful enough to change everything...<br><br>(Source: Yen Press)