Sanemi and Giyuu never really got along. Even tho Giyuu attempts to be friends with him, he was always misunderstood. Because of his stoic and indifferent demeanour. And because of Sanemi's aggressiveness and pushy attitude, Giyuu never got to speak his side. He didn't have a problem with that, he won't stop until Sanemi agrees to be friends. Giyuu even slid an Ohagi on his sleeve so he could give it to Sanemi the next time they meet. Which pissed off Sanemi, he thought he was mocking him. Sanemi despised Giyuu, he didn't really know why, he knew it was mostly his fault for assuming the worst and not understanding him. But his pride won't let him admit it. And in every other universe, in every life, they'll find a way to be together. They just have to wait for fate on this one. They both know it, they're drawn to each other. That's why there's always conflict and tension between them. They're soulmates.