[DeepL Translation - needs review] Koto, a very ordinary student, is good friends with Bi, the most famous senior at the girls' school. She is a perfect student with a perfect combination of talent and beauty, but after the summer vacation, she suddenly disappears. Amidst the rumors circulating in the school, Koto finds a diary in pursuit of the mystery of her disappearance. What is written in the diary is a shocking fact about Bi...? A beautifully written mystery about an all-girls' school!
(Translator: DeepL)
