Kanade returns to her hometown in the countryside for the first time in several years. Sara, the brother's wife, was the ideal wife who supported her brother devotedly and was just as plain and kind as before. However, on a midsummer night, Kanade witnesses Sarara drowning in pleasure through masturbation while sweating in a room with a broken air conditioner. In fact, the secret side of her serious brother's wife is a perverted slut who can't control her desires. Sara, who was seen in an extreme masturbation scene, seduces her brother-in-law right next to her husband's sleep and devours his young cock. From there, the two begin an immoral relationship that they cannot tell anyone about...
