The younger brother, who injured both his legs in an accident caused by his older brother, develops sexual desires for his beautiful sister-in-law who devotedly cares for him... In order to make his sister-in-law take responsibility for the accident, the younger brother demands sexual service. The sister-in-law does her best to make up for the responsibility caused by her beloved husband, but she climaxes multiple times during sex for the first time in a long time...