伯爵屋敷の事件簿 -交錯する二つの思惑- [The Case Files of the Earl’s Mansion – Two Intersecting Intentions]

A new case has come to the protagonist (the player), a London detective.
It seems that he received a warning letter from Earl Hilton, the head of the prestigious Hilton family, saying that he would be going in to steal jewelry.
The protagonist and his colleague, Officer Melode, go on a patrol of the mansion.
However, there were many motives and sexual desires swirling around there…​