After being laid off and returning to his parents' home, Keiji, the brother-in-law, starts living with the Usui couple. Unable to keep a job and always aimless, Keiji's sister-in-law Satomi takes it upon herself to give him advice, but her kindness only stirs his inferiority complex… Driven by his urges, Keiji sneaks into Satomi's room when she is alone. Caught off guard, Satomi soon succumbs to her desires, moaning repeatedly and finding pleasure in Keiji's cock…
