A socially awkward boy plagued by a strong, unpleasant body odor discovers that his scent acts as a powerful aphrodisiac for certain women. After a series of unexpected and intense sexual encounters with a classmate, a store clerk, and his teacher, he realizes that the very thing he is ashamed of makes him irresistibly attractive to those around him.
In a school where sex education has become aggressively practical to combat population decline, Mutahara is paired with the arrogant Takamine, only for their lesson to turn traumatic when a teacher forces a bareback encounter under the guise of a "practical lesson." Simultaneously, the school's self-righteous watchdog, Kasahara Chio, is lured into a trap by the victims of her previous exposés and subjected to a brutal gang rape as revenge for ruining their reputations.