I fold on the flop. If you're going to take the line you did, you should have just bet the flop. But I'm only c/ring a late/button bettor here, hoping to isolate against a stealer.

I also think the call preflop is thin. In a 1/2 blind structure, youre getting roughly the right odds to flop a draw, but this needs to be discounted somewhat by the fact that: (a) you're playing the draw OOP for the rest of the hand, and (b) the BB behind you seems to be a bit LAGgy, and might well raise the field preflop. However I dont object strenuously to the preflop completion.