Ep. 14: Kyuu reveals the forbidden truth about the spirit medium Asakura being the brothers' mother.

14

Kyuu initiates his deduction by identifying Kaoru’s brothers as the murderers of spirit medium Asakura and their aunt, who discovered their secret and attempted blackmail. When the brothers deny the accusations, Kyuu discloses the shocking reality that Asakura was actually their mother. Although they initially reject this claim, their mother’s secretary validates the facts, leaving them stunned. The brothers attempt suicide but are intercepted and taken into custody. Subsequently, Kyuu locates the will of Kaoru’s mother, which instructs him to present it to her sons to facilitate reconciliation. This revelation forces the siblings to confront their shared lineage and the tragic circumstances surrounding their mother’s death, resolving the case through the exposure of their hidden familial bond.