Tsumugi Akari has an unhappy marriage as her husband never pays attention to her; he is always thinking about his work, working all day long without realizing that she feels neglected every day. Despite this, Akari does not have the courage to abandon this marriage, so she pretends to be happy and content living with her husband every day.
One day, she accidentally meets her old lover from high school, a guy who is very skilled in intimate affairs, which makes her reminisce about those moments. Eventually, what was meant to happen happened, and Akari had her own secret plan…