During a quiet class, teacher Sawa Yuka suddenly lets out a loud, vulgar fart that fills the entire classroom with a strong stench. Enraged, she suspects delinquent girl Mayu Tachibana as the culprit and begins an investigation. As punishment, she exposes Mayu's anus and proceeds to slap her, spit on her, and lick her anally. The anal stimulation excites Sawa further, causing her farts to grow louder and more rhythmic. A must-watch scene of embarrassed Mayu and Sawa obsessively sniffing the farts.