As a child, Saori (Natsuki Ando) lost both parents and moved in with her aunt alongside her older brother. But misfortune constantly plagued her aunt's household, drowning them in debt. After graduating high school, Saori was forced into marriage with the younger son of a wealthy landowner to settle the family's debts. On the eve of the wedding, while Saori was dressed in her white wedding kimono, the landowner's young master, Monzaemon, entered her room. He approached her and began boldly touching her body, whispering, "You're beautiful. You've truly become a woman." His words stirred emotions deep within her. Trembling with fear and shame, Saori found herself drawn into his spell. "In our family, the eldest son takes what he wants first. But I'm claiming you before him—out of respect for him," he said, thrusting his thick black cock against her repeatedly. Feeling a man's hardness against her for the first time, Saori's mind unraveled under the lewd assault. Her brother Yuu, who witnessed the entire incident, is left to face an uncertain and fateful future.