Yuta, a childhood friend, is neither a friend nor a family member... nor a lover. I thought this relationship would continue forever. I felt that if I confessed it, this relationship would be broken, so I hid my feelings for Yuta and became an adult, and Yuta got engaged to another girl. On the night I was introduced to my fiancée, Miki-chan, I glanced at the sleeping faces of the two of them as they fell asleep together.