After a twenty-year separation following their parents' divorce, a mother and son reunite. The son, harboring deep love and admiration for his once distant mother, is consumed by desire. When he confesses his loneliness, she responds, "I'm sorry. If you can forgive me, I'll do anything." This ignites a twisted passion. The son eagerly explores her breasts and pussy, while Sakiko hesitantly begins to move her hips, and they both succumb to forbidden pleasure.