Volume 1 Introduction: Naruse Uta, an ordinary high school student, has a secret that he can't tell anyone. It is that he is in love with Kaoru, his brother's wife. It's a love that will never bear fruit, but she is happy with their daily activities, and on the other hand, her heart feels as if it will burst when she sees her brother's newlywed life... She stifles her heart. She suppresses her heart so that the love she has secretly hidden in her heart will not wake up...
