G-MODEアーカイブス+ 探偵・癸生川凌介事件譚 Vol.15「逢魔が刻の狂詩曲」

No one knows what it is or what it looks like...
Can you protect the treasure, "Tokoyo no Watashi" from robbers?

【Game System】
This is a mystery adventure game in which the player solves a series of difficult cases that occur in a fictional town called Marihama City in K Prefecture.
The player controls the main character in the scenario and solves the mystery by selecting commands in the conversation and deduction parts, and by gathering information and evidence that will serve as clues to solve the case.
The story progresses by command selection, so even beginners can easily play the game.

【Story】
A request came in to the Kibukawa Detective Agency.
The request came from an old acquaintance of Kibukawa, Daidoji Genzo, who wanted the protection of the Daidoji's treasure, "Tokoyo no Watashi", which had received a notice of theft.

Masao Ikurumi and Izuna Sagishima go to the site in Kibukawa's absence.
There, they become involved in a strange incident involving a hidden treasure.

They were investigating the hidden treasure at the Daidoji house.
Then, they find a strange corpse on a snow-covered road on the property.
What is the end of the story played by the dead body that no one knows...?