AUTHOR: AIKAWA Yu
There are rumors of a grand treasure located within the local museum of Ashiwara and that this treasure requires a special key to unlock. But no one seems to know what this treasure is or even what the key looks like. But Kei and Hikaru, two childhood friends, may inadvertently find out when someone seeks to claim the treasure for themselves and that action plunges their world into chaos.
From AQUA Scans: The Thousand Years Labyrinth, a whirlpool of mystery and intrigue, Does it show despair or hope? One day, brilliant young men will be gathered at the Thousand Years Labyrinth. They thought that the ceremony to select the next emperor had started but...?
From Fallen Syndicate: Since the death of his family in a mysterious fire, Nanasawa Io has lived as an outcast. Students at his school fear him and animals around him soon begin popping up dead. This brings about an investigation into Io by a group know as the Titans. The Titans goal is to hunt down and destroy Kagetsuki- people who have become possessed by malicious shadows. However, what the Titans soon discover about Io isn't what they expected.