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-