瞞著正牌戀人偷偷來一場溫泉約會！女大學生彌生醬和炮友開啟性愛集訓模式！

A woman with an irresistible body, slightly tipsy and defenseless, reveals her raw desires… Rei Kamiki, completely off-duty, drinks, laughs, and indulges in instinctive, vivid private intimacy.