Mio lives happily with her husband. However, one day, the man who once toyed with and impregnated Mio's best friend, her husband's younger brother, comes to stay. Knowing the couple's struggles with fertility, the brother-in-law forcefully assaults her, tying her up and ejaculating inside her... But her body begins to be drawn to her brother-in-law's potent cock more than her ED-husband's.
