螢

Six members of an occult spot exploration circle plan on staying in the Firefly Mansion located in the thicket of Kyouto's mountain ranges. One of the circle's prospering old boys bought this mansion known for becoming a crime scene ten years ago when a famous composer, the former owner of the mansion, murdered his six performing musicians in one night. What was supposed to be a mere test of courage and an otherwise relaxed camping among the circle members quickly turns into another murder incident.

鴉

After his younger brother Abel returns from a small mountain village not even mentioned on any map and getting murdered shortly afterwards, Kain finds and sneaks into this village to find out the truth behind his brother's life he had there, the reason for his sudden return and the identity of his murderer. His investigations unfold a tale of envy, hatred and hypocrisy...

『瑠璃城』殺人事件

1989, Japan: A corpse in a locked library. 1243, France: 6 knights suddenly vanishing from a castle. 1918, Battle of Verdun: 4 corpses vanishing from the front. And endless cycle of impossible crime situations and the predestined demise of 2 lovers.

『ギロチン城』殺人事件

Self-proclaimed detective Makube Nako finds a doll disposed on 'doll mound' that writes the message "Help" with a photo attached, that shows a girl standing in front of a guillotine. This indirect client leads Nako and his friend Yorishina Yuuki to the legendary Guillotine Castle, a place that stores numerous execution tools and is equipped with an excessive security system. One year ago, the castle's lord was found decapitated in a locked room situation with a decapitated Russian doll beside him. After Nako and his companion arrive, Guillotine Castle welcomes them with another locked room murder...