Sorry for the format here; the hand history isn't importing to RIO correctly. (Perhaps because of the dead SB? Just guessing as other hands are working fine.)

Anyway, feedback welcome on any street:

As I mentioned, this hand has a dead small blind. Hero is dealt 7d7h3d4c on the button. Everyone folds to hero ($51.76 stack).

I've been tightening up my button opening range since playing this hand, but I went ahead and opened for pot (75c). BB calls ($34.13 stack after posting; 68/44 over 25 hands with 50 AGG% but a very low WTSD, just 1/16 times).

Flop: 7s6s4h

I bet $1 into a $1.50 pot. BB calls.

Turn: (7s6s4h)3h

BB bets $3.36 into $3.50. I call.

River: (7s6s4h3h)Qh

BB bets $7.92 into $10.22.

This is never a raise, but is it always a fold?

I normally wouldn't mention the result, but I indeed folded here, which is obviously not an unreasonable play. But because it was a somewhat frustrating hand in a medium-sized pot, I marked it for review and thought it was kind of interesting when looking at it again.

Villain seemed to really wake up on the heart draw turn, which this river completes.

We block 44 and 33, but we also block some rundowns that would have straights here.

Villain's AGG% is somewhat eyebrow-raising (as is their line, to some extent). I'm inclined to think this is a flush that we lose to, a set that we beat, or a bluff that we beat. (Straights aren't impossible, but I just don't find them super likely, all things considered.)

Thoughts?