Yui-sensei in the nurse's office. The lustful male students, horny and lustful, continue to cast lewd glances at Yui sensei's bulge. One day, student Kashiwagi pretends to be sick and sneaks out of math class to sleep in a bed in the nurse's office. As Yui sensei nurses him gently, Kashiwagi can't help but get a full Yui and pushes her down. Yui panics and says no, but when the cheating student's huge cock is thrust into her, her womanly reaction overflows...!