I have twin brother. His name is Sumiyuki, a smart, very kind, cool younger brother who can do anything. On the other hand, I'm too weak to work. I've been relying on my younger brother for a long time since I was little. I ... I feel like I'm robbing Sumi Toru's life. I've been asked to do everything from long ago. Even now, I've been asked to do everything in my life. That's why I decided to leave my brother and become independent- "Why don't you depend on me?" My brother loves me not as an "elder sister" but as a "woman" and makes me depend on him.. The distorted love of my twin brother drags me to the bottom of the swamp and drowns-