Koyamasou no Kiraware Mono

Matsushima Shougo's dad has to move to the USA, but he doesn't want to move with him.
His dad's friend owns the Koyama boarding house, and he decides to move in there instead. To his surprise and dismay, he found out he'll be sharing with someone else, and his roommate is not someone who will give him a friendly welcome.
How will these two adjust to living with each other?