To help her husband with his work, Minami, a wife, has started taking English lessons once a week. As Minami and her busy husband lead a life of mismatched relationships, she begins to look forward to spending time with her English teacher, Lucas, as the lessons progress. She started the English lessons for her husband, but ironically, the two of them grow closer and she ends up accepting Lucas. It's Minami's first affair, her first big cock, and Minami penetrated in the deepest part of her vagina that her husband can't reach, she becomes immersed in pleasure so intense that she loses all sense of reason...