As part of measures to combat the declining birthrate, 'practical sex education' was initiated, where teachers directly instruct students using their own bodies. However, some students struggle to keep up with the lessons. To ensure they won't have trouble making children in the future, beautiful home tutor Matsuna-sensei visits the homes of adolescent virgin boys for direct sex education! The first time involves observing sensei having sex with a male teacher. The second time, sensei takes the lead in real-life procreative sex, resulting in his first experience of fertilization and pregnancy!
