A vulgar and explosive farting sound during a quiet class with teacher Yuika Sakiba. Moreover, there was a strong stench. The angry teacher Yuika decides to look for the culprit. It is probably the work of Mayu Tachibana, a problem in the class. As punishment, she exposes Tachibana's anus spits and licks it and slaps Mayu's ass. The anal stimulation excited her, and her farting improved. She farted rhythmically. Mayu Tachibana is embarrassed, and Yuika sniffs her farts!