My brother's wife came to the house where I was living with my brother. I'm completely an obstacle, but it seems we'll continue living together until I become an adult or graduate. But Mikako-san, my brother's wife, is a little strange... One day, Ayumi, who was suddenly kissed by Mikako, was told that the deciding factor in marrying her brother was the fact that there was a cute younger sister named Ayumi...
I Energy
