During her husband's absence, Shio finds herself increasingly sexually frustrated. Desperate for release, she becomes so absorbed in her masturbation that she accidentally locks herself out of their home. Fortunately, neighbor Satoshi arrives just in time with some souvenirs from his trip. When he enters the room to check on Shio, he discovers her in a state of ecstasy, moaning and shaking uncontrollably with pleasure. As she writhes beneath him, her breasts bounce wildly, capturing Satoshi's full attention. His long-suppressed feelings for Shio erupt into an intense passion as they embark on a lustful affair filled with newfound desires and forbidden thrills.

倦怠期に入り夫とセックスレスに陥ってしまった汐。欲求不満は限界に達し、淫らな一人遊びに没頭するあまり鍵をかけ忘れてしまう。そこに旅行土産片手にやってきたご近所さんの聡。汐の無事を確認するため部屋に突入した聡の目に映ったのは淫らに喘ぐ汐のイキ顔。快感に震えるたび、ぶるぶる縦横無尽に揺れ跳ねるおっぱい。密かに気になっていた汐の見たことのない痴態に聡の恋心が暴走していく。