Just sat down, villain 19/0 over 22.

Villain could be betting flop with nut FD, SD, better sets, and 2pair, but in a 3way pot with passive stats (i know tiny sample size) this bet has me thinking either sets or 2pairs (ie. a made hand). Only 2pair i see him having is 78s . Am i being way nitty? is this an insta raise?
Do i call and reassess?

$0.05/$0.10 No Limit Holdem
8 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG Gangurru ($19.95)
UTG+1 vicenzo01 ($10.40)
MP1 RiverRat2184 ($11.50)
MP2 Hero ($12.75)
CO ramstein007 ($7.75)
BTN 7 tuga7 ($9.65)
SB orisolo ($10.45)
BB GooD lucI< ($9.20)

Pre-Flop: ($0.15, 8 players) Hero is MP2
Gangurru raises to $0.30, vicenzo01 calls $0.30, 1 fold, Hero calls $0.30, 4 folds

Flop: ($1.05, 3 players)
Gangurru checks, vicenzo01 bets $0.70, Hero does what?