[Akubinium] The Case Of My Little-Sister's Ass Being a Next-Level National Treasure (COMIC LOE VOL.23 Maniacs) {Mistvern}

A chubby girl frets over her weight while her younger sister's curvaceous backside becomes the object of a brother's massive penis, sparking a playful yet forbidden attraction. Their teasing dialogue about dieting and sports clubs quickly gives way to intimate, body‑focused encounters that explore the taboo bond between siblings. The album delivers a vivid, titillating narrative centered on the sister's voluptuous derriere and the brother's overwhelming desire.