可愛い彼女がいながら「責められたい」欲求を抱える大学生・左慈。鍵を無くした夜、隣人の美人妻・スナオに招き入れられる。「旦那が不在で…」晩酌で火照った体を寄せられ、弱点の乳首を執拗に愛撫される。「乳首だけなら浮気じゃないよ…」甘い理屈と濃密な言葉に、抗う理性は崩れていく。彼女との行為では反応せず、隣妻の舌と指先だけを求める身体へと変わっていく――。
Despite having a cute girlfriend, college student Saji harbors a desire to be dominated. One night, after losing his keys, he is invited in by his beautiful neighbor, Sunao. "My husband is out…" She presses her body, flushed from her evening drink, against him and relentlessly caresses his sensitive nipples. "It's not cheating if it's just your nipples…" Her sweet words and intense sensual words cause his resistance to crumble. He no longer responds to sex with his girlfriend, and his body transforms, craving only the tongue and fingertips of his neighbor's wife.

– JavGG.net