A murder brought about by the twisted oppression of the Showa era...

A mystery puzzle novel game full of the emotion, fear, and macabre from the Showa era has arrived in the modern Reiwa era.

The Koto Murder Case... A horrifying locked room murder that beset the Ichiyanagi family.

Together with a detective novelist from Okayama, your goal is to piece together testimonies collected from villagers and those involved in the incident and uncover the truth.

Then, you must complete the detective novel based on this incident.

What kind of ending awaits you?

[From Steam]