The secret face of Sayuri, a student guidance student that I, as a class representative, is known only to me. After school, I spend my time exposing myself to the school with the most serious female teacher in the school.

Today, I can hear students anger in the hallway after school. This voice is from student guidance teacher Sayuri. He was such a serious and strict teacher who competed for the first or second class at our school, but as a class member and a dedicated student, I secretly liked Sayuri's attitude. One day, as I was climbing the stairs for a mobile classroom, I heard Mr. Sayuri's voice from above. I suddenly looked up to call out to him and found out that Sayuri-sensei was not wearing her pants. I was stunned by how serious a teacher was, and my crotch gradually became stiff...