Raised in the rural countryside of Aomori since childhood, young girl Ai Nonose had her life shattered three years ago when her mother suddenly abandoned the family for selfish reasons. Left alone with her father, Ai endured a quiet yet lonely existence—until her father tragically died in an unexpected accident. With no remaining relatives, she was taken in by her uncle, Kenzou, and brought to Tokyo, where she hoped to rebuild her life in what seemed like a kind and loving home. But one day, everything changed. Kenzou's demeanor took a dark turn as he began subjecting Ai to extreme BDSM: tight rope bondage, candle play, toy training, brutal spanking, and creampie after creampie. The gentle uncle she once knew was gone, replaced by a cruel dominator. This shocking transformation marks the beginning of Ai Nonose's harrowing journey into submission—a breaking-in story of a beautiful schoolgirl in uniform, tightly bound, trained, and repeatedly filled.