The Search for the Missing Explanation

This flow follows the investigation into Katsumi Matsunaga’s hidden testimony and its revelation of a lethal solution.

increasingBearing stren­gth in each eventdecreasing

Matsunaga’s Fragment

A Drunken Confession Tomoka’s Customer Tomoka Inose hears Katsumi Matsunaga mutter that he saved everyone, hid something in the classroom, and wanted to tell someone. An Unstable Memory Matsunaga remembers neither the conversation nor its meaning afterward. His fragment suggests that a physical record may survive where human memory cannot.

Forbidden Classroom Search

Into Building Zero Breaking the Rule Koichi Sakakibara, Naoya Teshigawara, and Yuya Mochizuki enter the prohibited second floor of Building Zero during summer break. A Hunt Through Dust They search desks, lockers, and storage spaces in the abandoned old Class 3 room. Their adventure gradually becomes a confrontation with the historical machinery of the phenomenon.

The Hidden Cassette

Evidence Above the Closet A Concealed Object Koichi Sakakibara finds a package taped to the top of a cleaning-supply closet. Its warning is addressed to future classes afflicted by inexplicable disasters. Damaged Testimony The package contains a broken cassette. The physical damage becomes another obstacle between the living students and the truth they are desperate to recover.

The Confession Played

Matsunaga Speaks Again The Fatal Struggle Katsumi Matsunaga describes fighting a classmate after the 1983 shrine trip, accidentally killing him, and discovering that the body vanished. Salvation Through Death The dead classmate had been the Extra Person. Once he died, the disasters ceased and everyone forgot him. The recording transforms a supernatural pattern into a terrifying instruction.

The Murderous Imperative

A Lethal Solution The Recording’s Command Katsumi Matsunaga tells future students to return the casualty to Death by killing the extra person. Moral Contamination The advice offers a possible end to the disasters while making every student a potential executioner. Knowledge does not free the class; it turns fear into suspicion and violence.

late July 1998

July 30 1998

July 30 1998

August 4 1998

August 8 1998