The term "anime-song" in the context of a porn video tag refers to a scene or content that involves an anime character singing or performing music. This could mean an animated music video, live action performance with animated elements, or simply scenes from an anime series where characters are singing or playing music. The focus is on the anime aspect and the song or musical performance being the main attraction in the scene. This tag would be of interest to fans of anime, music, or both who are looking for content that combines these two elements.