MOND-250 Longed-for brother-in-law and Minami Shirakawa

I'm staying at my brother's house due to work. My brother and I have different lifestyles, so we don't see each other much, but he treats my brother's wife, Minami, very well, so I was happy and excited every day. That's no wonder, since ever since my brother Kaminami was introduced to me a long time ago, I've been fantasizing about finding such a wonderful wife myself. One day, my work schedule changed and I came home to find out that...