GVG-506 Pregnancy making a surrogate Hina Sasaki

Synopsis

An older sister who is weak and cannot give birth to children. Hina, a younger sister, was asked by her sister to have sex with her husband. I agree that it is for my beloved sister, but contrary to Hina's innocent feelings, my brother-in-law drowns in Hina's young body and forgets me. And while the demands of his brother-in-law gradually escalated, the mind and body of Hina also changed.