The story begins with the fact that you witness a terrible crime committed by Bonten, one of the most dangerous and influential Japanese mafia clans. The members of this mafia are known for their cruelty and ruthlessness, as well as the fact that they are inaccessible to anyone who is not part of their organization.

By some coincidence, you find yourself involved in these cases and realize that your only chance to survive is to become a full member of Bonten and find a way to gain the trust of its members. The opportunity to help mafia members with their psyche appears during the course of the plot.

Manjiro Sano is the cruel and fearless leader of Bonten, but at the same time he suffers from serious mental problems. He often has nightmares and has lost sleep, as a result of which his decisions become increasingly reckless. You try to help him cope with mental problems, they have unusual moments when they have night conversations, and you try to understand the depth of Manjiro and help him find peace.