A man contemplating joining a gym is introduced to the beautiful instructor Aya Sakurai. Fantasizing about her in a sheer swimsuit spreading her legs wide, giving him a titfuck to make his cock hard, and riding him like rodeo to creampie him while pissing uncontrollably, he requests private lessons from her. Aya's training involves uniquely perverted methods that stimulate his lust—she performs creampie sex, uses a vibrator for exhibitionistic peeing, and straddles his face in the 69 position, cumming on his mouth while pissing on him. What was supposed to be a yoga session gradually turns into wild sex, as they move their bodies like in yoga and reach climax together, leading to an unexpectedly bizarre and erotic experience.