Yuzu who lost her parents and lives with her sister and her husband. One day, my sister asked me to give birth to my husband's child instead of myself, who has difficulty in having children.... After a conflict, Yuzu decides to make a child with her brother-in-law because of her sister's wishes. However, as if to betray the feelings of such sisters, the brother-in-law is absorbed in vaginal cum shot sex with Yuzu. And gradually a change is born in Yuzu's heart ...