Koto, a very ordinary girl, is good friends with Fumi, the top student at an exclusive all-girls' school.
Fumi is the perfect student, with her combination of talent and beauty, but after summer vacation, she suddenly disappears without a trace.
Amidst the rumors circulating around the school, Koto discovers a diary.
Hoping to solve the mystery of her friend's disappearance, what will Koto learn from the diary…?
 
(Source: Hakusensha, translated)
 
Note: Chapter count includes a volume-bonus chapter.

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