- "This diary belongs to So-young. "So-young Han, Junior, Homeroom 8." is written on the cover."
- — Examine Text
So-yeong's Diary is an item in White Day: ALNS and the Remake.
So-yeong leaves her diary on the bench in the courtyard of Yeondu High School on 13th March, 2001 during the day. Hui-min finds her diary and tries to return it at midnight (after the school curfew at 10:00 PM) along with a White Day Candy. The story of WhiteDay and the Yeondu High School Paranormal Incident occur on the same day.