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Volume 1 Introduction: That puzzle, always incomplete — what do you think about, what do you wish for, what do you dread? The pieces that make up who you are… Several years after graduating high school, Mizuho receives a sudden phone call — news of the death of her former classmate, Haruka Origuchi. Haruka had been quiet and unremarkable, but Mizuho is now told something she never knew: that Haruka had been pregnant in high school. On top of that, Haruka's mother asks Mizuho to find the father o...