Ema Kato, a beautiful teacher, visits a hot spring inn for a preliminary inspection of a school trip. She shares a room with another teacher, but says she doesn't mind. While Ema is sleeping in her yukata, the male teacher secretly plays a prank on her. At the hot spring, Ema appears boldly naked. Even when touched by the male teacher, she doesn't seem entirely displeased. The two end up pleasuring each other, keeping it a secret from their respective spouses. Ema's fellatio is so lewd that he ejaculates in her mouth. Back in the room, the male teacher sucks on Ema's cute breasts. He also carefully licks her down below, getting Ema extremely excited. In return, she gives him another blowjob with exquisite tongue work. After stimulating each other's genitals in a 69 position, the main act begins. Enjoying themselves to the fullest in various positions, the two teachers finally finish with a creampie.