Anxia, who has moved to Tokyo to prepare for college entrance exams, stays with her brother's family. Anxia, who is reserved and somewhat perverted, has few friends of the same sex. Her sister-in-law, Hikaru, is friendly and speaks her mind without hesitation. Anxia gradually finds herself drawn to Hikaru. During her brother's business trip, Hikaru ignites Anxia's erotic desires and attempts to make her her sexual slave. Anxia slowly gets pulled into a world of perversion.
