Accident insurance investigators check injuries and illnesses, prevent fraudulent insurance claims, and assess payment amounts. Kasumi is the insurance company's trump card, seducing victims and engaging in erotic acts, which allows them to determine their health and cancel insurance premiums. Today, she uses her H-cup breasts and thick pubic hair to negotiate erotic fare with little sister lovers who want to be called "big brother," masochistic high school girls who frequent sexual pleasure spots, and scumbags who are busy picking up nurses! "Oh, your body and dick are in great shape♪"