That JAV

The family consists of four members: father, mother, brother, and Kokomi. Kokomi has been kept by the family since she was born... As she grows up, her breasts swell and she gets her period. The father and brother have incestuous sex with her on a daily basis, calling it play. The mother is happy to see her daughter grow up. From the outside, the family looks strange, but for Kokomi, this family is the only one she has. Will there be a bright future for Kokomi, who is growing up without any schooling...?