My sister-in-law's alluring scent made my legs burn with desire. (Erika Kitagawa HBAD-174)

The younger brother, who lives with his older brother and sister-in-law, has always harbored feelings for his alluring sister-in-law. One day, he unexpectedly witnesses her playing with his brother's student's penis... Seeing this, the younger brother can't resist thrusting his penis into his sister-in-law, who naturally and gently reciprocates. Thus, a forbidden relationship begins.