a crown for a heart (слэш)

Viktor Nikiforov, heir to the Russian monarchy, is sent to Japan to prepare for an arranged marriage with the Imperial Family's mysterious Prince, Katsuki Yuuri, whom Viktor has never met or even seen before. Days before the engagement party, he meets a cute brown eyed shy boy who refuses to give him his name.
He knew it was a bad idea. To fall in love with a person not of royal blood was going to ensue multiple problems. But Viktor is conflicted, the government is confusing, and why the hell does his fiance disappear whenever he enters the same room as him?