Tsugumi, a younger sister, is forced to hold her brother's hard cock. Even though she rejects the daily harassment from her brother in her mind, when she thinks about her brother hating her, she offers up her small body. When she is ordered to pour saliva into her brother's mouth, she squirms her sticky saliva, and when she is told to hold his erect cock in her mouth, she serves him with all her might with her small mouth and receives his semen. At night, her father soils her mouth with his customary deep throating, spreads her shaved pussy and makes her leak love juice with intense cunnilingus, and when his big cock sinks into her small, narrow petals, she ascends to heaven with an expression that doesn't know whether it is pain or pleasure. Her father's thick semen is poured deep into her vagina, and today she becomes the family's sex doll again. And tomorrow she will be soiled with the same semen of her father and brother...