I don't think he even wanted the throne to begin with. I think he wanted what it symbolized. He wanted to be recognized, to have his "father" see him as a man and to have power. But in reality, he probably knew he couldn't handle the pressure. He was never 'groomed' to be a ruler. He was born from incest, into a bat shit crazy family. He needs actual love, acceptance and stability but instead no one said 'no' to him so he go to act out as much as he wanted. At least with Arya, he gets a challenge but also learns about his own faults and maybe discovers he wants something else...or that he needs to wait before taking the throne. 

My post actually mentions a vacation. XD I think deep down, she knows she's over-worked. She'd never complain to Koenma, maybe to some of her reaper gal pals. And she cares for Koenma and her job. She's damn good at it. But she does need to consider a better end-game than where she is now. With Kurama, she can see the big picture a little easier. She'll have someone to come home to and cuddle up with at the end of a long day of taking souls away from the things/people they love. Kurama should tag along when she does do a job. It would be something she'd take comfort in sharing with someone else. 

You know they gonna bang in the school closet. XD 

In the bushes...

On the roof...

Greenhouse fo sho.

And I am almost done, one more paragraph and it's done~~~!