N

My vision and mind were consumed by N.

The disappearance of five junior high school boys. The brutal murder of an entire class at ■■ Elementary School. A car crash leaving two dead. The letter "N" was left at the scene of each of these crimes.

A popular urban legend has it that the main culprit is a religious group named "N," which was supposed to have collapsed 2,000 years ago. What on earth is "N"?

(Source: Kadokawa, translated)