How it began, I don't even know—but before I realized it, the balance in my household had already collapsed. Ten years ago, when I married my husband, my stepson Tatsuya and my younger stepson Kazuya were both bright, cheerful, and friendly boys. But after Tatsuya failed his entrance exams, he started shutting himself away at home, and Kazuya gradually grew darker, his personality twisted and unstable. One day, Kazuya approached me with a sullen gaze, demanding sexual relief. Trying to comfort him in that moment, I gave in—only for Tatsuya to catch us in the act. As the darkness within our family deepens, I can't help but fear what will become of us all.