You have taste, sir! [Spoiler Alert] in case you didn't watch the series already.
K Project is by far one of my favorite anime's among with some other ones but holy sht, i missed something here. I can tell you i expected more from Shiro as the Silver King (first king) but i was kinda prepared for this disappointment. After the Green King appeared, all went down hill and the immense power he had was incredible, though didn't expect him to fight against 3 King's at the same time and i was right, the Grey King appeared, in which he was shown as the right hand from the Green King at the beginning episodes of the season. All in one, it was an amazing anime!! The Ending was...well kinda unhappy for me, the Blue King survived yeye but...enough spoilers!!!
Watch it at your own risk