"Practical sex education", which started as part of measures against the declining birthrate, is sex education in which teachers teach "directly" using their own bodies. A married woman teacher with her husband and two children decides to teach her for her students while struggling with her embarrassment and guilt towards her family. Direct sexual guidance from a male teacher to a female student, and a male student's libido runaway that made him think about a female teacher who returned to work after giving birth also occurred...! ?
