Airi Miku started attending swimming lessons recommended by a friend, hoping to relieve stress built up from her relationship with her husband. Unexpectedly, this led to a sexual relationship with her instructor. Their encounters in the pool weren't enough—soon they continued their affair at her home. Despite her youthful, innocent appearance and shy expressions, her huge breasts sway as her shaved pussy gets wet, trembling slightly while she orgasms repeatedly. The fact that she, who'd long been in a sexless marriage, says "Let's do it again," clearly shows just how good it felt.