I can't see it. The uke seems to want revenge from the seme before anybody else. He's the one who killed his father before his own eyes. If he ever forgives him It will look weird to me. I am just expecting them to get closer because of the promiscuity and the seme to fall hard for the uke and then near the end sacrificing his own life to save the uke from a specific danger. This way he'd have redeemed himself somehow. I want this to be a tragedy and that seme to suffer from the uke's lack of love until the very end
If you remember the convo between seme and the king before he was dispatched to his current place...it seems seme is for some unknown reason bound to follow King's orders whether he personally likes it or not. And i personally think that when uke will discover that it was king's order that seme was just following and King is the main person who uke has to kill or take revenge from... and seme will help uke in killing the king and clearing his family's name then i think uke will forgive seme that way.
Hey... if they weren't on such bad terms and if their history didn't spell a future bloody tragedy then I can see them working well to quell the various political conspiracies.
Of course, emphasis on the IF