PokerStars - $0.25 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4: http://www.pokertracker.com

BTN: 100 BB (VPIP: 18.10, PFR: 12.07, 3Bet Preflop: 9.62, Hands: 119)
SB: 202.16 BB (VPIP: 18.68, PFR: 14.87, 3Bet Preflop: 7.43, Hands: 811)
BB: 100 BB (VPIP: 16.57, PFR: 11.83, 3Bet Preflop: 2.78, Hands: 172)
Hero (UTG): 106.88 BB
MP: 146.56 BB (VPIP: 18.10, PFR: 13.79, 3Bet Preflop: 9.80, Hands: 118)
CO: 176.4 BB (VPIP: 50.00, PFR: 31.51, 3Bet Preflop: 12.73, Hands: 150)

SB posts SB 0.4 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has Kc Kh
Hero raises to 3 BB, MP calls 3 BB, fold, fold, fold, fold

Flop : (7.4 BB, 2 players) 8h 6s Qd

Hero bets 5 BB - Standard Cbet here

,MP raises to 12 BB, Hero calls 7 BB - This is where I get lost, what can villain be repping? 88, 66, QQ? I don't think these hands are likely to raise on such a dry board. I suppose he could overvalue AQ or KQ?

I decide to just call to keep all his bluffs and worse hands if he has any. Only J10 and 79 really have equity.

Turn : (31.4 BB, 2 players) 9c
Hero checks, MP bets 20 BB, Hero calls 20 BB

when I take the passive line I suppose I have to just call here?

River : (71.4 BB, 2 players) 3c
Hero checks, MP bets 72 BB, fold

Vs overbet is usually nutted so I fold with my 1 pair hand.
MP wins 68.2 BB

I feel the mistake I made is on the flop, just I just check/call. or just rip it in with KK?