Anzu, who went to Tokyo for college entrance exams, ended up staying at her brother's house. Anzu, a shy pervert, has few female friends. Her sister-in-law Hikaru is friendly and talks about anything without hesitation. Anzu gradually gets drawn to Hikaru. During her brother's business trip, Hikaru ignites Anzu's erotic desires and tries to make her into her own sex slave●. Anzu gradually gets pulled into a twisted world.
