Ruka Inaba's first challenge as an undercover investigator! Ruka infiltrates an enemy organization to rescue hostages, but falls into an unexpected trap and is captured. Subjected to intense torture, her body and mind are systematically broken. Her voluptuous body is dominated and controlled, day after day, as psychological domination takes hold. Ultimately, she forgets her mission entirely, descending completely into submission, surrendering her mind and soul to her captors.