Shei Shi Na Ge Ta

After the unexpected death of his upbeat younger brother, Mu Siyang enters his school to uncover the truth behind the incident. As he digs deeper, disturbing revelations emerge: his roommate had a casual relationship with his brother, the brother's supposed boyfriend allegedly wished him harm, and everyone at his part-time job had an interest in him. Mu seeks to understand what his brother endured before his death.