Des：Ayai adores her brothers wife Yui like a sister, and visits her brothers wife whenever she has free time. Ayai trusts Yui because she can talk to her about anything and she is able to give advice that she cannot give to others. One day, while comforting Ayai who was heartbroken, Yui finally kissed her. From then on, the two had a different relationship than before... Ayai trusted Yui and entrusted himself to her.