The part about the incident happened in girls school in Kara no Shoujo is actually inspired by another novel by Kyogoku, “Jorōgumo no Kotowari”. In addition to the case's exquisite conception, it also offers a deep feminist critique and deconstruction. Highly recommended
Kara no Shoujo is a popular VN work, but few readers know that it was inspired by "Mouryou no Hako” written by Kyogoku Natsuhiko. I strongly recommend you to read this book no matter you’ve played the game or not. It’s indeed a masterpiece (also has anime/manga adaptations
