Despite Touya's efforts to keep the mysterious postcards a secret from his family, the next appears in Ao's room, pulling his son into the fray. With each new card, it becomes harder to doubt their prophetic nature and ignore their calls to save those in need. After racking his brain for some clue as to who could be sending them, an old memory comes back to Touya--a summer spent under the trees, a fleeting friend, and an all-too-familiar gift. However, while Touya's past may hold answers, Haru's is home to a phantom who's begun to stir once more.