This was inspired in Malaysia of The incident at SMKBU4 refers to a tragic stabbing that occurred on October 14, 2025, at SMK Bandar Utama 4 in Petaling Jaya, Selangor, Malaysia. A 16-year-old female student, Yap Shing Xuen, was fatally stabbed by a 14-year-old male student, Lum Chin Hau.