I was kinda put off by payu in the beginning but i really grew to love his and rain's relationship. They were definitely the core of the series even when it wasnt focused on them. After episode 7 i was so confused. It wouldve worked much better if the storied intertwined more instead of being all about rain/payu the first half and pai/sky the second half. It felt like the story was complete after episode 7 but they had a contract to fill 13 episodes so they had to make something up to fill space. If i ever rewatch its only going to be the first 7 episodes. I could say more but id be wasting my time like i wasted it on the second half