Is Your Classmate a Real Person or an AI?

[Undercover Infiltration] + [Deduction Duel] + [Campus Spy Games]

The police say my younger sister committed suicide. I don't believe them. With Professor Li's help, I went undercover as a visiting student at the high school my sister attended before her death. By chance, I found a USB drive she had left behind. What does this anomalous regression line really mean? And what unspeakable secret does my deskmate Yueyue know? In a campus shrouded in a reign of terror, who can I trust? I swear I'll get to the bottom of this. Whoever hurt her will pay ten times over.

There is only ever one truth!