If your opponent activates a card or effect that targets your "P.U.N.K." monster(s) (except during the Damage Step): You can target 1 card your opponent controls; destroy it. You can only use this effect of "Gagaku P.U.N.K. Crusher 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; this turn, your opponent cannot target "P.U.N.K." monsters you control with card effects, also they cannot be destroyed by your opponent's card effects.