Although Saki is a strict teacher, she secretly enjoys having an affair with a student. She knows the risk of losing everything if she is found out, but she even enjoys the thrill of it, thinking that it will be fine if she hides it well. However, the situation changes when her student, seeking excitement, starts to press her for a relationship even at school. Saki begins to feel scared of having an affair next to the students. However, the experience of climaxing while desperately trying to hold back her voice is an exciting experience she has never felt before...