In Episode 1 of Kinbaku no Yakata: Ryakudatsu (also known as Bondage Mansion: Plunder), the story introduces Yukio Mimura and Reika Uehara, who live peacefully in their family's mansion. The two share deep feelings for each other and believe they will live happily together. However, their tranquility is disrupted when Hayato Mimura, their cousin, arrives one night and demands that they leave the house. Yukio refuses to comply, leading to a tense confrontation.
To resolve the dispute, Hayato proposes a contest reminiscent of one their fathers used to settle similar conflicts in the past. The challenge is to see who can "break" Reika first—emotionally and psychologically. The winner will gain ownership of the mansion. This sets the stage for a dark and twisted competition, as Yukio and Hayato employ various methods to assert dominance over Reika, pushing her to her limit.
