Step into the boots of Yasunari, a young man scarred by a tragic past of childhood abuse, loss, and abduction. Saved from the brink of suicide by Osamu Dazai, you are now a member of the Armed Detective Agency (ADA) in Yokohama.
But peace is a luxury you cannot afford. Having survived a horrific kidnapping and torture by Mori Ougai of the Port Mafia—who desperate wants you as his second 'Demon Prodigy'—your psychological abilities, agile escape techniques, and fragile mind are constantly tested. Navigate Yokohama's underworld, lean on your colleagues in the ADA, and survive the dangerous factions that want to use you or break you.