Mary is masturbating with her nipples in the classroom after school, and Ai becomes turned on by witnessing this. Ai makes Mary masturbate and watches, pinching her erect nipples until they are rock hard, and then licks them up with her skillful tongue. Mary's nipples are stimulated as they become slippery with Ai's viscous saliva, and she feels even more, until she can't resist Ai's naughty tongue technique and has a nipple orgasm. Mary then uses her long tongue to tease Ai's nipples, and she can't help but moan at the sensation of her tongue. Her sensitive nipples twitch and spasm as they are sucked, and she finally climaxes from her nipples. A total of 5 pairs included