Continuous. If your opponent activates a card, or a card effect, that targets a "P.U.N.K." monster in your possession: You can target 1 card your opponent controls; destroy it. You can only use this effect of "Gagaku-P.U.N.K. Crash Beat" once per turn. If this card in its owner's Spell & Trap Zone is destroyed by an opponent's card effect: You can activate this effect; for the rest of this turn, "P.U.N.K." monsters you currently control cannot be targeted by, or destroyed by, your opponent's card effects.