late last saturday at the ccc simmering in vienna. I just got moved to this table 1 orbit ago. no info on villain (30 something years) other than he is most likely a czech midstakes cash reg.
I guess he asumes that i'm an internet kid (in his early 30s.)

so table is 7 handed atm. 2/5 with a live-straddle.

I (1430) open 7h7s utg+1 to 35,
co calls, straddler (villain with 2,5k) calls.

flop (112): Tc, 7d, 4c
checked to me and I bet 70, co folds, villain calls

turn (252): 3h
v check calls my 180 after like 15 seconds

river (612): 9d
checked to me and I bet 390, villain tanked for 20secs and said 'I think your bluffing' and then shoved for my eff. stack (755).

I think up to the river is standard (maybe size it different?) so i'm particulary interested on what to do otr?

all inputs are much appreciated.-thank you!