Kira and Lissa go to diving classes because their parents want them to, but they get very bored since the instructor is a little strange, while he is not in the waiting room, they decide to get a little playful with the big tits from Kira, but the instructor catches them in the act! They try to make excuses but he threatens to tell their parents everything. They are blackmailed into doing whatever he wants and fulfilling his dark fantasies of breathing and diving in exchange for their silence!