"I've always loved my sister-in-law." Akira had a faint crush on his brother's wife, Kaori (Hinami Yumesaki). He had given up on the love at one point, but now that his brother's affair was discovered and his brother and his wife were facing the threat of divorce, Akira begins to make moves to make Kaori his own. Meanwhile, Kaori is unable to hide her shock at the unexpected confession. A woman's heart is torn between her husband and Akira. But gradually, she begins to be drawn to the powerful pleasure of sex that she could not experience with her husband...