[Aoi Kojika] Suki na Ko ga Kinshin Soukan Shiteru wake nai!

Rinna looks like pure innocence at school—sipping fruit punch and nibbling coppe-pan while her classmate silently swoons over how cute she is—but the title's desperate claim that there's no way the girl he likes is committing incest crumbles the second she's alone with her brother. What follows is a feverish reveal of this little sister's hidden appetite: eager fellatio, a relentless doggy-style pounding that leaves her crying out, and a teasing ride on top where she purrs 'onii-chan' and coos that he looks like a girl, and cute. A winking farewell of 'I'll see you again...' with little hearts promises this forbidden secret is nowhere near finished.