This surgery is suitable for females without labor via vaginal delivery. Because these patients have a relatively tight vagina inside, regional tightening correction is conducted, and it targets the mucosal folds at the vaginal opening to increase the sensitivity of friction between the penis and vagina and elevates the intimacy during sexual intercourse. It is mainly conducted by stitching the loose skin and mucosa adjacent to the vaginal opening for tightening, which extends inward by approximately 3–5cm from the vaginal opening. Dr. Chuang first implements regional longitudinal resection of the vaginal mucosa at the vaginal opening, then detach the annular sphincter below the vaginal wall and properly tighten the sphincter with strong sutures, and finally, stitch the wound at the vaginal mucosa. Vaginal opening tightening effectively narrows the vaginal opening to within the width of two fingers and creates prominent or relatively rough skin folds, which not only improve pleasure from the friction of male genitals but also enable females to feel the tight sensation during sexual intercourse. Therefore, due to the effective improvement in the quality of sexual behaviors, it is accepted by numerous patients without natural birth.