The "Spence Mammary Gland Development" series, in which Non-chan Kobana appears with beautiful big tits, aims to develop the G-spot of the breast, the spence mammary gland, in order to develop a new sexual sensation zone in women. The series consists of a mammary gland development massage, nipple-irritating spence stimulation sex, and incontinent spasms with body bending over from sticky toy torture, and more. Her beautiful body and pie-pussy are very attractive, and the film is full of naughty parts.