I decided to stay after class under the pretext of studying, and as soon as the teacher left me alone, I started playing with myself. I took off my shoes and panties and started massaging my pussy with a butt plug in my ass. I took a dildo out of my backpack, moistened the toy thoroughly with my saliva, and put it all the way down my throat. I jumped on the desk and started riding the dildo with the butt plug still inside me. Then I started fucking myself in the ass with the dildo, legs up in the air, until I was almost caught by the teacher.