[Umino Sachi] Gakkou... Dai ni wa inshuu tatsu kouchou shitsu de

Saya gets talked into a cake-shop detour on the way home, unaware her boyfriend Kazuki is already busy in the principal's office—where the curvy, bespectacled older woman eagerly rims him and begs to be stretched by his toy. What follows is a sweat-soaked, stench-thick session of toy play and relentless backdoor pounding that leaves the shameless principal cumming repeatedly from both holes. Thoroughly drained and dripping, she sends him off to finish with his waiting girlfriend, insisting that students always come first.