KK how to play this hand?

PokerStars - €0.87+€0.13|10/20 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

Hero (UTG): 75 BB
MP: 77 BB (VPIP: 33.33, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 3)
CO: 83 BB (VPIP: 22.58, PFR: 13.33, 3Bet Preflop: 0.00, Hands: 97)
BTN: 73.5 BB (VPIP: 0.00, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 3)
SB: 74 BB (VPIP: 16.17, PFR: 15.15, 3Bet Preflop: 3.23, Hands: 168)
BB: 67.5 BB (VPIP: 62.50, PFR: 25.00, 3Bet Preflop: 0.00, Hands: 8)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has K♠ K♦

Hero raises to 5 BB, MP calls 5 BB, fold, fold, fold, fold

Flop: (11.5 BB, 2 players) 8♥ A♠ 9♦
Hero bets 7.5 BB, MP calls 7.5 BB

Turn: (26.5 BB, 2 players) 7♣
Hero checks, MP bets 8 BB, Hero calls 8 BB

River: (42.5 BB, 2 players) J♣
Hero checks, MP bets 8 BB, Hero calls 8 BB

MP shows A♦ A♣ (Three of a Kind, Aces) (Pre 82%, Flop 100%, Turn 100%)
Hero mucks K♠ K♦ (One Pair, Kings) (Pre 18%, Flop 0%, Turn 0%)
MP wins 58.5 BB