$2K eff. I open 9♣ 9♠ to $40 in MP1, MP2, button and SB call.

J♥ 9♥ 8♦ $170 SB checks, I bet $110, MP2 calls, B raises to $420, SB folds

MP2 is a TAG grinder, I would describe as solid but snug. Haven't played with B before but he's been very active, 3-betting a lot and also displaying a lot of aggression in pots postflop and taking it down with no showdown. 25ish guy. Could be a grinder or just a LAGtard.

How do we respond to the raise now and what would be your plan for all future streets?