/jp/ - Otaku Culture

Can i get an explanation of how mana markers work? i know a regular, non MG aware guy is just gonna snatched by wathever comes first or the standard succubus, but let's say one is aware of how monster girls works and goes for a specific type, or becomes completely infatued with a race, does he just become 'marked' and other races just ignore him? Even the rape first ask questions later like Hellhound and Manticore?
In a more practical sense, i live in a mediterranean continent but love the fuck out of white horns, if the portal opens will i be safe in my journey to find one or i will raped and taken by the first catgirl/ dog-girl that crosses me on the street and that's the end of my adventure?