Rie Tachikawa, the featured girl at a massage parlor, is known for her H-cup big tits. Regular customers become aroused by the softness of her breasts during treatment and forcefully take advantage, acting as if given permission for erotic acts. Rie is serious about her job and always strives to provide careful service, but despite feeling embarrassed, she ends up performing tit-focused erotic massage. A senior colleague instructs her by saying it's a "new massage technique," leading to sex while coating her massive breasts with oil.