To the limit (Pixiv Fanbox)

Proper orgasm denial isn’t easy, it’s a skill a trainer must learn in order to torture our trainees as best as possible. Here we see an expert trainer show her skills with a feather. Gently stroking the sensitive tip, making sure the trainee feels the movement of each of the feather’s fine hairs and the warmth of her tight grip. A good trainer can hold a trainee on the brink of orgasm for hours, possibly days, without allowing them to relieve themselves, turning pleasure into an absolute hell~