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 erection 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...!