After actually watching this work, I was first surprised by how deeply the psychological drama between the sisters was portrayed. The complex relationship between Miyu and Nanami, especially the mother's curse-like repeated phrase 'Compared to your sister, you...', creates a process of deep-seated inferiority and hatred in Miyu's heart that slowly comes through. The psychological descriptions are carefully crafted, and the actresses' performances solidly support this dark and heavy atmosphere. A unique tension seeps from the screen, pulling viewers in unconsciously. The script shows thoughtful effort, shining not just in erotic scenes but in thoroughly depicting the conflicts in human relationships. How the sisters' strife unfolds keeps you glued to the screen until the very end.