Easy fold on the flop with overpair?

[Philuva]

15-30. I raise utg with black kings. 5 people including the BB cold call. 6 to the flop with 12 small bets.

Flop is 886 with 2 diamonds.

BB checks. I bet. 2 callers. LP raises. one fold. BB 3 bets. Is this an easy fold?

No read on any of the players other than they are appear to be your typical party players that are slightly too loose and slightly too aggressive.