It sounds like you’re digging into a very specific and fascinating corner of Philippine cinema history. Let me help you connect the dots.
However, Myrna Castillo starred in and "Malibog" (1985) . The most likely link: "Naked Paradise" (1987?) --LINK-- Pinoy Pene Movies Ot Narcisa Myrna Castillol
If you’re looking into a specific film involving (perhaps Oscar Narcisa of NV Productions) and Myrna Castillo , one notorious film that fits is "Toro" (1980s?) or "Ang Babaeng Nawawala sa Sarili" ? But a better known title: "Scorpio Nights" (1985) ? No — that was Peque Gallaga. It sounds like you’re digging into a very
