[China] Imouto wa Doujin Shoujo Cosplay Kei Ch.1-5 [biribiri]

When his little sister Kozue needs hands-on research for her ero manga, her devoted onii-chan becomes the willing test subject—and soon the rest of her doujin circle joins in, each cosplaying girl eager to study the real thing she's only ever drawn. From the school club room to Aya-senpai's maid-costumed curiosity about what a dick actually tastes like, five aspiring artists discover that reference material hits different when it's raw and buried inside them. Hours later, all five lie cum-drunk and dripping with his seed, destined to sweep the scene as the legendary Big Five of Ero Doujin—though their poor brother won't survive long enough to see it.