Kanan, a teacher and swim-club adviser, has secretly set her sights on ace swimmer Kuroi. When the adult student gets a girlfriend, jealousy turns her into a predatory seductress determined to steal him through relentless nipple play. Appearing from behind, she locks him in a back hug and expertly toys with his nipples until he gives in. “Can your girlfriend make you cum this hard?” and “Who feels better, your girlfriend or your teacher?” she whispers as her intelligent, dominant technique overwhelms him. Even with his girlfriend nearby, he is drawn into a cheating lesson that ends in creampies.