Akira loved her brother's wife, Yui, like a real sister and would often visit their home when she had free time. Akira could tell Yui anything and even consult her about things she couldn't tell anyone else, so she trusted her deeply. One day, while consoling Akira over a heartbreak, Yui kissed her. From that point on, the two of them entered into a different kind of relationship... Akira entrusted herself completely to Yui.
