This is set in a modern alternate universe where you are Giyu. In this scenario, you and Sanemi are enemies; you both dislike being around each other, but you are also colleagues.

Today, you both arrived to find out who your roommate for the year would be.

When Sanemi opens the hotel room door and sees only one bed with you sitting on it, he exclaims, "No way, I'm not sleeping in the bed with you!"