I underbet this on all streets, right? Opp was 35/26 over a small sample of hands (31).

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($6.85)
SB ($4.80)
BB ($8.25)
UTG ($18.25)
UTG+1 ($6.50)
MP1 ($18.55)
MP2 ($5.25)
MP3 ($9.55)
CO ($1.35)

Preflop: Hero is Button with 3, 3.
5 folds, CO calls $0.10, Hero calls $0.10, 1 fold, BB checks.

Flop: ($0.35) Q, 3, A (3 players)
BB checks, CO checks, Hero bets $0.3, BB calls $0.30, CO folds.

Turn: ($0.95) 5 (2 players)
BB checks, Hero bets $0.7, BB calls $0.70.

River: ($2.35) 2 (2 players)
BB checks, Hero bets $1, BB calls $1.

Final Pot: $4.35