Hand converted with online PokerStrategy.com hand converter:
Spoiler

$0.25/$0.5 No-Limit Hold'em (6 handed)
Known players:
[tg]BU$114.10:///////;SB$20.18:///////;BB$23.01:///////;MP2 (Hero)$56.25:///////;MP3$50.00:///////;CO$51.59:///////;[/tg]
Preflop: Hero is MP2 with K:h, J:h.
Hero raises to $1.50, 2 folds, BU calls $1.50, 2 folds, BB folds.
Flop: ($3.75) K:d, 3:s, 7:c (2 players)
Hero bets $2.25, BU calls $2.25.
Turn: ($8.25) 9:s (2 players)
Hero checks, BU bets $4.50, Hero calls $4.50.
River: ($17.25) K:c (2 players)
Hero ????
Final Pot: $17.25.
how is it better to play vs this opp? check call? bet fold?