Book excerpt: Sex ed never truly ends! Neither sex nor education are simple binaries, and Naoko Tsuji realizes she still has a lot to learn! Even for a sex ed specialist, it’s difficult to translate her own advice to real life —how should she handle her sexuality and her feelings for her coworker? As the school culture festival unfolds, Moriya, Kashiwa, and Matsuda conceive a plan to give their lovestruck instructor some extracurricular help. In this last lesson, the students become the teachers!