Shiori Shirayuki (白雪詩織) was a participant in the social-media-linked Bishoujo Koshien Vol.31 photo-book competition held in July 2026. Competing under the X handle @sweetshiorin, she finished fourth overall and won the competition for a Shinjuku Station advertising placement. Reliable independent biographical details beyond the organizer’s event reporting were not located.
Update
Beauty Pageant Vol. 31 Entered Its Final Two Days With Yuki Takada in Front
The July 29 snapshot placed Yuki Takada first and set out the photobook, exhibition and advertising awards still in play before voting closed July 31.