Streaks of Blue, Streaks of Red

Prince Haruka does not want to be King. He just wants to be a kid. So when one too many lessons are skipped, the King only wants to teach Haruka his place no matter what. That's where Rin Matsuoka comes in. Only the King could physically discipline the Prince, but nobody said anything about the Prince's best friend being off-limits. Eventual RinHaru. Whipping Boy!AU.