Raihan tries to be a good friend and be there for Leon. Even if he doesn't want to admit it, this whole shitshow affected him as if he was hit by a fucking train. Leon is going through the worst period of his life, Rose betraying him, putting everyone's lifes in danger and actually almost killing Leon on the process, losing his title after 10 years, etc.
It's begrudgingly mutual Piers has no intention on finding himself an alpha. After a run-in with Galar's top three, he catches himself having an affinity for one of them.