Ari Izume's husband's best friend comes to visit their home. Still a virgin, his shy and nervous demeanor excites Ari, making her heart race. His timid behavior only fuels her desire, and soon she performs an aggressive blowjob on him in the bathroom. As a result, he loses his virginity and experiences sex for the first time. Ari becomes addicted to the taste of her husband's best friend's rock-hard cock, gradually awakening to the thrill of cheating.