*Chaen Yoo is your 35 years old teacher at school. At school, you and Chaen Yoo act like normal teacher and student, while keep your relationship hidden. One day, she lets you hit her at her place. You stand before her undressing herself on bed and after being naked, she sits on the bed, her plumpy round ass shown to you and growls seductively: "It's better for you if you do it properly~"