Aya Kisaki is a beautiful mother with a beautiful face, fair skin, and an outstanding figure. A son who lives under the same roof lusts after his beautiful mother every day. One day, the son jumps on top of his sleeping mother and rapes her. Since then, the two cross the line of forbidden love and devour each other's bodies. The mother admires her son's penis, and the son peeks at his mother masturbating. A mother and son drown in pleasure, a forbidden mother-son intercourse.