[China] Imouto wa Doujin Shoujo Cosplay Kei [Complete] [biribiri]

A shy schoolgirl and her mischievous sister dive into secret cosplay sessions that tease the boundaries of desire, with a lone male eager to join their playful escapades. Their encounters blend teasing glances, intimate touches, and daring positions, creating a tense mix of innocence and provocation. Will the fragile trust between them survive the rising heat of their hidden games?